This is a very pleasurable show that I am sure you are certainly going to enjoy. Get ready for these glorious ladies and prepare to dive inside this special session with them.

Amazing compilation that you are going to love

Gianna Dior

Sybil A

Blake Blossom

Kenzie Anne

Sera Ryder

Madi Collins

Lily Lou

Kayley Gunner

Valentina Nappi

Things we once considered science fiction are rapidly becoming a part of everyday reality for the large part of the population of the third rock from the sun. One of the reasons for such a development is human lust. The porn industry is happy to utilize new technologies. BaDoink VR is one of the proud pioneers of this trend. This New York-based porn studio has been set in that direction since its foundation. They have gone that far now, that they are spreading into teledildonics and haptic technology. This allows partners to simulate sexual relations over a distance. It is clear - the future is here. Videos by BaDoink VR tend to be shot in POV style, and are covering a large variety of categories. The models performing in them are gorgeous sluts, willing to bring the pleasure of virtual reality sex to people around the world. This can be checked by watching VR Porn Videos. These top-notch virtual reality porn videos are meant to rock your world. Porn is set on leading the world into the embrace of the future, and BaDoink VR is one of the companies leading the charge. Enjoy these great videos, created to bring pleasure to most demanding porn fans.

Badoink VR

She has an incredible body that's just waiting for your cock! You just can't wait to get your dick inside this hot beauty as she gets her tongue on the head of your cock and starts fooling around!

Can we make your day special?

Extreme immersion lives at VRhush.com - the home of erotic VR porn in original 4K HD video content.   Downlaod your favorite scens, or take advantage of HD streaming to let your senses run wild on any VR device.  Teen VR porn stars, MILFs, Natural Tits, and more.  Abigail Mac, Elsa Jean, Honey Gold, Karlee Grey, Ella Knox and all your favorite virtual reality porn stars can be found in one place, doing naughty things to get off.  Frequent updates mean the action never gets old and members can access hot and sexy Virtual porn from any VR viewing device or desktop computer.  Discover the world of VR porn the VR Hush way.

VRHush

You are surely going to enjoy this awesome session with her. Immerse yourself with this perfect cutie and have some fun with this perfect beauty right here and now!

Vinna Reed is one superb flight attendant

POV Central VR

You are a nasty voyeur and you like finding people and catching them in flagrante! Doing who knows what! Today you see your new neighbor having fun with some random dude.

Who is this sexy-ass neighbor on that stiffy?

PerVRt

Nicole Barbie - Play With My Doll

VRoomed

Leya Desantis is enough reason to click "play" on any video, but it's the setup and realism of this immersive VR porn scene that takes the cake. Everything from the setup of driving the car down the road to the way she smiles as leans back in the passenger seat sells your immersion in this hot & sexy fantasy, but as the tension ramps up and she bends over to suck your cock in the car, you'll be transported back to that one time you did this in REAL life... and we gotta' say, we're pretty sure this time is still better!

Car Quickie – Leya Desantis

Fucking The Assistant I

Angelica Heart sucks cocks like no one else! After the photoshoot sesh with her photograph, she is ready to get those knees dirty! And she does it with fervor, to make the dude rocklike.

A steamy oily photoshoot session with Angelica

Only3X VR

Get to experience a highly immersive session with the world-famous teen pornstar! Fuck her while she's a teen and get to enjoy all her young curves in this wild session!  

Stacy Cruz shows off her lingerie

Lust Reality

Her nice melons bounced as you slammed your long cock into her wet pussy then she rolled over and got on all fours so you could hit it from behind! You fucked her in a few different positions then welcomed this horny MILF to the neighborhood with your hot, sticky load!

Your new MILF neighbor

Latinas are addictive. Once you spend some time with them, you can't get enough of them. They are beautiful, sexy, exotic, fun to be around, and hot in ways that can not be counted. If they are horny, you are in for a treat; and all of the girls in VRLatina are eager to have some naughty fun. Sexy chicas are determined to get some action,  and you will be the instrument of their pleasure.  Forget about standard porn. In virtual reality, you will get an opportunity to have a fiesta of a lifetime. There are no boundaries. You will get a chance to party with Adriana Medina, Alejandra Zapata, Sofia Vasquez, Tatiana Morales, Gabriela Flores, and many others. If you aren't acquainted with these women, look at it as a spice to add to the adventure. People creating virtual reality porn videos for VRLatina are set on constant improvement. Their dedication is one of the motors that are running the revolution currently happening in the porn industry. Latinas in VR Porn Videos are natural. Most of these girls are at the beginning of their careers. There is an almost amateurish allure around them.  The enthusiasm for this website is captivating. Enjoy the visit.

VRLatina

Prepare yourself for an unforgettable VR porno experience starring Majo Blonde, the incredibly cute and seductive Latina. Today you are going to love every second with her!

Don't be fooled by her innocence

Athenea Rose returns to POVCentralVR for a high-octane episode that will blow your gasket. The randy brunette gets you in the mood by showing off her perfect body and then donning a sexy racer girl outfit. She shifts into high gear, putting your pole into position for some turbocharged sucking and fucking. You'll cross the finish line with a titjob-to-completion that leaves her breasts covered in your sticky cum.


Athenea Rose: Racer Girl

This is a horny mommy that is more than happy to make you go wild! So immerse yourself with her and get the sweet release you have always been craving for!

A woman like this is all you need

VirtualXPorn is a website with a little bit of everything for everybody. There are pornstars and amateurs, teens and matures, unusual fetishes and quite common ones; milfs, lesbian, anal, deepthroat - all conventional categories, and some of them a bit peculiar - all in all - more than twenty of them. Veteran porn fans will probably find the charm of VirtualXPorn very appealing. The aesthetics of this website resembles that of porn magazines that were so common, until the turn of the centuries, when the internet took over. A teaspoon of nostalgia in virtual reality porn videos? That is an interesting twist, you must admit! VirtualXPorn found a way to utilize modern technologies while keeping a link with the past. A touch of tradition is always a good thing. A large percent of models appearing in the videos are amateurs, but you will come across pornstars like Jennifer Mendez, Lady Dee, Lovenia Lux, Blanche Bradburry, Angel Wicky, Victoria Daniels, Wanessa Cooper, Jarushka Ross, and Sandra Sturm. To check the skills of these hotties and their amateur friends, take a peek at VR Porn Videos. All you have to do to enjoy the fun that VirtualXPorn is offering is to put on a headset and immerse yourself.

VirtualXPorn

Hana Kannou has a tongue that is far longer than any other human being's. Her long, saliva-filled tongue clings to her dick like a snake as she licks it all over. 

Kanohana Toungue Kissing Wild Sex

Eagle

Kandy Benks is one amazing woman and today this beauty is surely going to make you happy and pleased. Step inside this session with her and enjoy something very passionate. 

The wonderfully amazing Kandy Benks

Doesn't this ebony babe just look stunning in this amazing lingerie set! Her big tits are really something you should look at every day to keep your stress down! And if you want a more intense session just skip ahead and watch her lose it on your dick! 

The first timer in porn

Bamby Doll - Making Love All Saturday

VRixxens

Bella Rico is a fantastic Spanish model and she is surely going to make you cum more than ever before. Have some fun with this cutie and immerse yourself unlike never before.

Bella Rico is in a fantastic mood

XsinsVR

Katrine fucks everyone she likes, even her uber drivers! She likes this dude so much that she immediately shows him how slutty and sexually open she is. She takes off her duds and the fucking can start with a beej!

Uber picks up a girl and she has her twat boned

VRP Films

Cindy is one stunning babe and today she is surely going to make your dick explode. Have some fun with this awesome babe and enjoy the most passioante show ever! 

Cindy invites you over

LustyVR

This lady doesn't want to joke around when it comes to fucking and sucking on your big rod! She wants to please you, because this video is made for you and not for her! 

Hard sex awaits you

Teen Mega World VR knows that your first time viewing pornography in virtual reality is an exciting moment but can be confusing so they have done their best to keep their site easy to navigate and follow. They made their transition from regular 2D adult entertainment to virtual reality adult entertainment quite easily and are offering anyone who signs up for a membership with them access to the whole original 2D Teen Mega World video library. You can use your phone or computer with any of the supported virtual reality headsets such as the Oculus Rift and Samsung Gear VR headsets. This website also offers full support for mobile phone browsers. All off the videos to be found on this website have binaural audio and are filmed in 180 degree 3D for smooth head tracking. Several videos are added to their library every week to keep it growing as well as supply fresh content and new experiences to members. One month of access costs $20 or you can get 3 months for $13.31 per month or you can pay for their best deal which is 12 months for just $8.33 a month. You can pay with a credit card, PayPal, check, BitCoin, Epoch, Vendo, or SegPay. Buying a membership with this website gives viewers the best of both worlds for the price of one since you get to view both 2D and virtual reality videos with a membership. They currently have approximately 4400 different adult entertainment videos for their members to get lost in with more being added all the time. 

TMW VR NET

We could all use a little relaxation from time to time, but if you want to REALLY let go of your worries, you'll need the help of a young babe like sexy brunette Ayana. Don't worry about a thing, because she's here for one thing and one thing only: to be your personal entertainment and stress relief in an erotic fantasy meant to carry you away on your fantasies with one of the sexiest young babes that VRoomed could get their hands on - Ayana.

Stress Relief – Ayana

You know this babe way too well! And if you haven't tasted her yet then you just have to get a hold of this babe asap! A skinny babe with a huge desire for hard cock is hard to find! 

Waiting for you by the pool

VRConk is the place for some of the hottest women on the planet. Big tits, small tits, everything you could ever want for your virtual reality porn!

VR Conk

There are days where you have to just sit around and unwind. In the wake of a difficult seven day stretch of work, investing energy by the pool, relaxing in a hot tub and taking in a staggering perspective has a method for improving everything. That and sex. Parcels and bunches of sex. It's actually what Derrick Pierce has as a top priority. It's his chill day today. It's additionally Aubrey Adam's chill day. Which implies hot tub, an extraordinary view, and bunches of sex. 

With his excellent plans set, Aubrey reveals to Derrick she coincidentally planned her yoga session for that day. She needs to extend her body, all things considered. Bashful Love, the acclaimed yoga educator, comes over and starts to assist Aubrey with her positions. They hone a couple of moves appropriate by a goliath window watching out over the pool, giving Derrick an epic view. He can feel his rooster develop. While this should be his chill day, there is no space at all for blue balls! Derrick chooses to make his turn. 

Derrick goes inside and intrudes on the yoga session. The young ladies are somewhat reclaimed at first, however Derrick demands the yoga session be rescheduled for an alternate day. All things considered, he and Aubrey have a couple of different plans today. Bashful Love at last consents to reschedule, leaving Aubrey and Derrick all alone. 

Aubrey would not like to state anything, however she's happy Shy Love left. Her pussy has been throbbing for chicken and it's now shimmering. She needs fulfillment. She needs Derrick's monster dick somewhere within her. There is no preferable chill feeling over in the wake of screwing, in any case. 

Derrick wouldn't like to keep down. In the wake of going down on her scrumptious pussy and drinking up each drop of her, he gives her his cockerel. Aubrey welcomes it with her mouth and shows it exactly the amount she adores it. In any case, that is not all she needs the chicken for. She needs and needs it somewhere within her, or, in other words Derrick does. 

Enjoy this content from VR Hush a.k.a. VRHush! 

Aubrey Adams Takes A Huge Dick

Her cunt will be the best Xmas present for you, do you agree? She is someone that likes to fuck in the doggy pose, and you can treat her like a bitch. It makes her go crazy from how good it feels.


She wants to wish you a Merry Christmas with her cunt

PS-Porn

Whitney Wright was with her boyfriend and he ditched her to hang out with his friends. This naughty young lady has a revenge plan, to fuck his handsome stepdad. Her big booty is simply unreal, she rides daddy's big cock so hard and loud.

Whitney Wright fucks with BF's stepdad

Get only the best and sluttiest babes in this hot compilation! Step into your desired sexual fantasy and stay there for as long as you like! And with a wide assortment of babe, we are sure you will find the one you like the most!   

Compilation of the best babes on the web

Do you like to fuck in the ass? Then you will certainly enjoy this! This chick is here to please you in every way you can imagine! So put your VR goggles on and test your cock! Because this babe is cock hungry and won't let you go when you start!

This tempting babe is about to get her anal wrecked

RealJamVR is proud to offer some of the hottest adult entertainment actresses such as Paula Shy, Kristy Black, Nicki Stills, and so many more. They have videos from several different genres and each one is filmed with the most advanced virtual reality equipment in 4K Ultra HD 3D meaning 180 degree viewing at 60 frames per second. Also, RealJamVR fully supports viewing devices like the HTC Vive, Oculus Rift, Daydream View, and Samsung Gear VR so that you can enjoy their awesome adult entertainment library from the comfort of your smartphone. 

Real Jam VR

Enjoy your XXX honeymoon with Lindsay Maddox! It has been a big day and now it is time for the wedding night! Give it to her and creampie her pussy too.

Lindsay Maddox – Enjoy The Honeymoon

VRMansion

Welcome to our Stefan Steel Fantasy channel where all fantasies can become real in VR!

Today on our channel Stefan Steel Fantasy we will deliver a pizza to Andra Brazil.
How do you think the pizza will pay, guys?
Enjoy viewing to all Virtual Reality lovers.

The Pizza Guy Fuck Me Andra Brazil

European Models VR

Hot Lilly Bella and sultry Marilyn Sugar are two students who are not embarassed to seduce their teacher just to pass the subject. They will suck his boner and kiss each other sensually, just for the passing grade.

Two naughty students pass because of their sex skills

18VR.com lets you play with horny teen VR porn stars whenever you want.  They'll even include FREE VR Goggles with every membership.  We all know there's nothing like an 18 year old teen porn star in stunning 5K virtual reality porn to get things heated up.  Lady Bug, Cheryr Kiss, Katrin Tequila, Stacy Sommers, Theresa Bizarre, Vanessa Decker and all their horny friends are waiting for you to join them at 18VR.  Signing up lets you make the most of all the outrageously hot categories to choose from, such as petite babes in VR threesomes, or hot teens waiting for you to give them doggy style, missionary or a good old cowgirl ride.  18VR is the next generation of teen VR porn, and thanks to crystal clear 4K, stereoscopic 3D videos - you'll never want to leave.

18VR

Linda Del Sol - Sexy Senorita

Matures VR

This super sexy slut is ready for you and she is going to take that big dick and shove it so deep up her pussy that you won't be able to see it! So get to see a wild girl in action!

Afternoon fucking session

Admit it! The name was enough. You already have a hard-on. Man adore women in stockings, and women enjoy being adored. There aren't many things so delicate and powerful, at the same time as stockings. The sex appeal of the woman in stockings is immensely enhanced. Everybody, O.K., virtually everybody will have a reaction to fine female lingerie, of which stockings are an important part. The idea behind StockingsVR is shockingly obvious and great at the same time. Putting a bunch of beautiful, handsome ladies in stockings in virtual reality porn videos is simply brilliant. There isn't the slightest chance of misfire. Right on target. Bullseye! Now everybody is horny. The girls in the videos are eager for some action, and you are turned on, like a schoolboy being seduced by the most stunning cougar you could ever imagine. Putting on a headset and immersing yourself in the VR Porn Videos seems like the most reasonable thing to do at this point. Some of the girls in hot lingerie, waiting to make your day are Blanche Bradburry, Nikki Dream, Victoria Daniels, Nathalie Cherrie, Barbara Bieber, Angel Wicky, and Antonia Saintz. Those hot lingerie fetish sluts are ready to engage in all kinds of hot actions, to satisfy you. It is time to share some pleasure. Hurry up, join them and enjoy those long beautiful legs in stockings.

StockingsVR

Dive into the world of perfect blowjobs with these two fine hotties and make them scream for your dick as they keep on sucking and sucking until you are completely empty! 

The want to make you blow

RealHotVR

Most of the holidays are during winter, but they can still be so sultry! Well, they can when you get to bang Lucy, who is charming and so seductive. She places her petite body on your fat donger.

Lucy Heart shows you a holiday can be steamy

Nobody does MFM threesome action like stunning redhead amateur Lenina Crowne - and now you can experience sharing her with another guy in a fantastic, erotic, and just downright sexy VR video that's gonna' make all your hardcore fantasies come true. Watch her suck a cock while you fuck her tight pussy or see her tits bouncing while she's getting pounded and adoring your dick with her tongue. It's all yours in this two-part hardcore threesome. 

Darling, There's a Viking Invading My Pussy

Things started out with the regular couples hooking up then, once they had fucked, they swapped so Katy could get some cock from Megan's man and vice versa! The guys got sucked by both babes, fucked both girls, and came on both girls! Best night out ever!


Night out with another couple that likes to fuck

The adult entertainment website VR3000?s sole goal is to provide their subscribers with only the best quality virtual reality pornography videos. The amount of attention that they put into video quality is what sets them apart from their competition in the industry. Videos on this website are available in 4K Ultra HD at 60 frames per second. As if that was not the best part, they are also fully compatible with both Android and Mac computers as well as all of the major virtual reality headsets like the Oculus Rift, Samsung Gear VR, HTC Vive, and Google Cardboard.</p>
<p>
VR3000 is always adding new content to their growing library. They upload a new virtual reality scene at least once a week to keep things fresh for their members. If you have a membership with their website you can stream and download unlimited videos from their content library onto your computer or phone or even tablet. There is a technician team constantly updating their technology and tracking anything new that is released for virtual reality to keep providing their members with anything but subpar experiences. Signing up for membership with them is really easy and costs just $16 for one month of unlimited virtual viewing. The $16 for one month membership is the most popular but users can also purchase 3 month and 12 month memberships for longer viewing periods. This website is one of the most affordable out there. They accept credit cards as well as PayPal for membership payments. 


VR3000

A sexy and cute blonde is waiting for you in the bed! What are you waiting for? An invitation? Go right ahead and see how it is to bang the perfect woman with a huge cock! 

This babe wants to play

What does it look like to bed Elena Muze, a sexy blonde who likes titty sex? You'll see right now if you wanna! Elena is not famous yet, but this chick has what it takes and everyone can see it right off the bat!

Elena Muze wants to shake of the sheets with U

Suck Me VR

If life has you stressed out, there's nothing better to relax yourself than a massage from redhead VR porn star Shona River.  Her hands know exactly what to do to get you to loosen up.  She'll also tickle and rub your cock into an immense erection quicker than you can say "That's the spot". Let this massage VR porn melt away your tension as you prepare to bust your load all over Shona's tight stomach and small tits.

Massage Ends With Huge VR Cumshot

SexBabesVR is your go to website for virtual reality adult entertainment if you like actresses such as Dillion Harper and Riley Reid. All of the videos that are available on this website can be watched using virtual reality headsets such as the HTC Vive, Oculus Rift, PlayStation VR, and Samsung Gear VR and a smartphone. Each video features 180 degree filming and binaural audio with 3D technology delivered at a whopping 60 frames per second to give you the most immersive experience possible. This website caters to everyone with all kinds of different categories and scenarios to choose from.

SexBabesVR

Mila Ray is a special woman that can always make you happy. Immerse yourself with her and enjoy this passionate show right here and now that can always please you. 

Hot Busty Stepsister Mila Ray

Ariela Donovan is a blonde beauty who wants to please you in this POVCentralVR episode. First, she slips out of her bathrobe to show off a sexy bodysuit and glove combo designed to arouse you. She lets you fondle her hot body, then sucks your cock, finishing you with a cum-in-mouth finale.

Ariela Donovan - Bodysuit

Once again, you are hanging around your Greek apartment, complete with a view of the Acropolis. Suddenly, the Goddess of Love reappears before you, ready to share her erotic blessings with you. This time, she has taken the form of the beautiful Zlata Shine. She delivers some heavenly blowjob and fucking action. And once again, this being a divine situation and all, it’s no surprise that Aphrodite swallows your cum after you come into her mouth. And she leaves a special memento of the experience with you before returning to Mount Olympus.

Zlata Shine: Goddess Of Love

Mina K Medina is a brunette bombshell and today this wild beauty is going to give you the ultimate stress release. So, dive inside and enjoy fucking with this immaculate woman.

She always wants everything from you

In this immersive VR experience, Luna Ray, the epitome of sensual desire, takes center stage in a raw and passionate rendezvous. The air sizzles with anticipation as Luna indulges in a feast of pleasures— from an enticing blowjob to electrifying doggy style and the sultry moves of reverse cowgirl. Luna, petite and tantalizing, showcases her perky tits with an unapologetic allure that will leave you captivated. As the voyeur of this intimate affair, the perspective ensures you don't miss a single moment of the action.

Luna Ray - Raw Meat

It's the best training session for you to lose some weight! Get to fuck with this adorable woman and fuck her like the slut she is! Grab her body and enjoy everything she has to offer!

Stretching on your big dick

Super hot Latina, Veronica Leal joins you in a tropical getaway of her native Colombia. She entices and seduces you as she strips off her clothes to reveal her tight, sexy body. She passionately sucks your cock before allowing you to fuck her tight pussy in all the positions you could dream of.

Tight Latina wants you to stick it whole

Cutie from this video wants to be a slutty nurse, so she fulfills her dark fetish fantasy with you! She is submissive and perfect, and hot as all the nurses from TV shows are.

Blonde amateur shows you her dark fetish

Terrible

Mia Brown is one curvy and stunning MILF that is surely going to make your dick explode. Have some fun with this awesome babe and enjoy the most perfect show out there!

Come and see Mia Brown in action

Gia Tvoricceli is a horny flight attendant in this POVCentralVR episode. The sexy stewardess seduces you with a hot lapdance, and before you know it, your cock is in her mouth. Gia then offers up her body to fuck as you please. She finishes the job too and makes sure there is no mess with her cum-swallowing finale.

Gia Tvoricceli: The Flight Attendant

The Forbidden Fruit II

Miley Sin - Invest In My Ass

Lili Charmelle is a cute and punky babe with a love for the cock.. your cock! Enter VR with her to play with her pussy and fuck her doggy style too.

Punky Babe Wants Dick - Prologue

There is no running away from these two babes! These warm bodies are just what you need in order to cum your brains out! Relax with them and set your differences aside! 

They love sucking your cock

A night in the Sahara definitely sounds hot - but it's a whole lot wetter than you ever imagined! Meet and fuck adorable milf amateur Sahara in the latest gonzo VR, POV scene from studio perVRt.

A Night In The Sahara

Marry Foxx is ready to have some fun with you inside this spectacular show. Step inside this session and enjoy a fantastic session that can always make your dick explode. 

Marry Foxx wants that deep

VRPornJack

It's not just her flawless body with tanned skin, big boobs, and raven black hair! It's her attitude! Her pure, craven lust for you that comes through in this VR porn experience! You've got a date scheduled, so grab your VR headset and go wait for Nikol in bed!

The best date ever

She will slowly start rubbing your body to get your dick hard for her incredible body! Dive deep into Stacy Cruz and explore how much you can take with her fine body!  

Stacy is the woman for you

Your GF Isabella brings you dinner after work, and you are both excited to dine together. But she only brings you food because she wants to give you calories she plans to burn with you!

Isabella wants to give you a romantic afternoon

After a hot striptease, Rachel gets down on her knees to please Chad, who is waiting like a boss. He will have such a good time because this stunner is delicious, and great in bed.

Rachel Roxxx strips for Chad White and gets dirty

Thundercock

Come and feel this babes mouth all around the head of your cock as she pleases your dick until you cum all over her petite and skinny body! She wants to give you a workout that you won't soon forget!

Start wining with this babe

Get ready to have your mind blown! We've got this smoking hot brunette babe who has a drop-dead gorgeous body that'll make your heart race. And guess what? She's getting it on with you right in the living room.

The sexy lady of your desires

PornCornVR

Compilation experience featuring Miley Sin, Lindsay Maddox, Baby Dee, Jessica Joy, Leya Desantis, Ayana, Rosse, Isabella Snow, Lily Delice, and Powerpuff Girl.

Cumshot Compilation from Vrixxens

Holly Molly spends a weekend in a beautiful hotel. She enjoys nature and everything the hotel offers but misses somebody nice and handsome. She desperately craves to meet a hot dude but sees nobody worth her attention. Finally, she notices a cute lad and decides to flirt with him. She asks him a couple of usual questions, teases him, and takes seductive positions to show her gorgeous body. Holly Molly realizes they are alone by the pool and moves on to the next stage. She caresses the dude, hugs him, and rubs his dick through his pants. He gives Holly Molly the same pleasures and gives her every satisfaction that she needs, even a cumload of sperm.

Seducing a cute stranger

Amber Jayne is ready for you and she is surely going to make you cum hard. Get ready for a passionate ride with her and immerse yourself with this gorgeous woman!

Amazing compilation that you are going to love

-73%

Today's Offer

-73%

Today's Offer

Up next

Amazing compilation that you are going to love

-73%

Today's Offer

-73%

Today's Offer

Up next

Up next

Related videos

(3.1k Videos)