HDTenEightyP/NetNews huggingface dataset:
Newsgroups: rec.autos
Subject: Re: TINTED WINDOWS LAW ??
From: stubbs@hawk.cs.ukans.edu (Jerry Stubbs)
Date: Wed, 16 Dec 1992 21:28:19 GMT
Organization: University of Kansas Computer Science Dept

That light tint might do more than you think. Mine has a thin
molecular layer of aluminum, which is supposed to block a lot 
of the heat that would come in through the windows.



Newsgroups: rec.autos
From: RZAA80@email.sps.mot.com (Jim Chott)
Subject: Re: 4x4 Newsgroup
Followup-To: rec.autos
Organization: Motorola SPS
Distribution: usa
Date: Thu, 17 Dec 1992 19:54:19 GMT

In article <livc70INN7si@exodus.Eng.Sun.COM>, tut@cairo.Eng.Sun.COM (Bill
"Bill" Tuthill) wrote:
> 
> Which brings up a question.  Are dirt roads considered off-road,
> or on-road?  If on-road, what about *really bad* dirt roads?  If
> off-road, what about an excellent gravel road?  I once travelled
> an unpaved road around Mt. Saint Helens that was surfaced with
> volcanic ash.  It was the best unpaved road I have ever been on--
> we were able to drive our family Camry at 55 mph.

This is a touchy subject.  Technically, at least on federal land where
we drive out west, we never drive "off-road".  That depends on what you
consider a road.  Anyway, unless we are in a designated OHV, (Off Highway
Vehicle), area, we stay on mining or ranching roads.  These are usually
rough enough that you don't need to go off the roads.  I guess I personally
consider any road that requires 4WD to get through, "off-road."

Jim Chott                            85 Toyota 4WD pickup
rzaa80@email.sps.mot.com             72 Lemans Sport Convertible
Tempe, Arizona
Newsgroups: rec.autos
From: kelley@cwis.unomaha.edu (Sean Kelley)
Subject: Re: Ways to make vehicle more visible when parked
Organization: University of Nebraska at Omaha
Distribution: can
Date: Wed, 16 Dec 1992 18:43:30 GMT

donald@sq.sq.com (Donald Teed) writes:

>I park my vehicle on the street on a cul-de-sac which seems very common
>for the area of Toronto in which I live.  The other morning I noticed
>the rear driver side corner had been struck by another vehicle - which of
>course did not stay or leave contact information.  I am wondering
>whether there are any ways I can mark the shape of the vehicle better,
>so that its outline would stand out better to blurry eyed drivers.
>Ideas: tape, reflective tape, reflective clip ons.  I am not certain
>that the impact occured at night and so colors like yellow are of interest.
>My vehicle is a burgundy Mazda pickup.  Who sells accessories in Canada that
>would help, and fall short of painting the whole thing neon pink?

Well, you could just put those nasty little reflectors all over the car,
and put a bunch of tires around the car as to avoid damage on
impact...or you could reenforce the steel by pouring concrete into the
panels...and put i beams on for bumpers...and then go looking for
whoever hit you and run them off the road...but that is just my
opinion...actually....DONT put any tape on the car, IMHO, it just makes
the car look like hell, i am afraid that your car was just in the wrong
place at the wrong time....it was jsut one of those things...fix it back
up and park in a different spot where traffic is light...like in a drive
way or end of the culdesac....

--
	    ________________-----------------_____________
            \                                            /
             \  SEAN KELLEY    KELLEY@CWIS.UNOMAHA.EDU  / 
              ------------------------------------------
From: dwrig@tog-34.hac.com (David Wright)
Newsgroups: rec.autos
Subject: Re: Emblems, names and meanings...
Date: 18 Dec 92 04:07:58 GMT
Organization: Hughes Aircraft Company, Fullerton California

In article <BzEuo2.GpK@boi.hp.com> wesf@boi.hp.com (Wes Fujii) writes:
>
>     Toyota used to just say "TOYOTA" and now they have an emblem
>     (looks like a silly cattle brand to me).
>
Actually, it just occurred to me that the new Tau symbol fits in the same
space a Geo symbol fits.  Makes it easy to badge engineer the Corolla/Prism.

David Wright
From: nau@ssesco.com (William Nau)
Subject: Re: Stretch Hyundai
Organization: SSESCO
Distribution: usa
Date: Mon, 14 Dec 1992 19:35:54 GMT

In article <1992Dec14.185927.90589@watson.ibm.com>, anand@watson.ibm.com () writes:
|> I saw an amazing sight here in  NJ a while back:  A stretched Hyndai
|> Excel. Looked quite cool. Jet black and tinted windows. I suppose a
|> minor Mafia boss might get one assigned to him until he moved up to the
|> big leagues. I can see the progression:
|> Stretch Hyundai -> Stretch Camry -> Stretch Caddi -> Stretch Rolls
|> 
|> R. Anand
|> anand@watson.ibm.com

I saw something similar once.  Except I think it was a Dodge product.
What I really found funny, as I pulled up next to it, was that my
Crown Victoria was longer and MUCH wider.  I laughed out loud at their,
so called, limo.  I'm sure that I had a better ride was well.  I know
who would win in an accident.  I was truely amazed that someone would
go through that much trouble, unless it was a joke.  If only their
windows wern't tinted.  I would have loved to see their faces.
-- 
William R. Nau
Supercomputer Systems Engineering and Services Company (SSESCO)
511 11th Avenue South, Suite 216
Minneapolis, Minnesota 55415-1536
(612) 342-0003

nau@SSESCO.com
Newsgroups: rec.autos
From: Tom Wetzel <twetzel@ucs.indiana.edu>
Subject: Re: classic rods
Organization: Indiana University
X-Useragent: Nuntius v1.1
Date: Tue, 15 Dec 1992 16:51:04 GMT

In article <1gkrc2INN468@master.cs.rose-hulman.edu> Michael A Kreiberg,
kreibema@NeXTwork.Rose-Hulman.Edu writes:
>Does anyone have an interest in the older automobile?
>
>I have a '56 chevy truck and a myriad of performance parts and
accesories  
>from the 60's
>Including a complete 1967 350hp corvette motor.
>
>I would love to see more postings involving this era

Michael,
I have an interest in the older Corvettes.  I enjoy reading about the
68-77
Vettes and have some interest in the mid years too.  I have a '79 but hope
someday to be able to afford an older one in decent shape.  A fellow I
work
with here at I. U. has a '50's Chev. truck and about 6 old Vettes. 
Perhaps
I can entice him to join any discussion.  Myself, I'm not a mechanic but
I enjoy the older cars.  

Tom
From: rollo@xylogics.com (Dena Rollo)
Newsgroups: rec.autos
Subject: safety questions-sedan vs. wagon
Date: 14 Dec 1992 07:31:23 -0600
Organization: UTexas Mail-to-News Gateway
NNTP-Posting-Host: cs.utexas.edu


I'll be looking for a new car within the
next few months, and have a question I
thought someone out there might be able
to answer:

Are there any safety differences between sedans
and station wagons (same car- for instance,
Camry sedan vs Camry wagon, or Accord sedan
vs. Accord wagon)?

I'd appreciate any response - email is better, as
I don't read this group.

thanks very much,
Dena Rollo (rollo@xylogics.com)

Newsgroups: rec.autos
From: norcott_bill@tandem.com (Bill Norcott)
Subject: Re: Civic LX, Saturn SL1.. what else should I consider...
Keywords: pl. suggest choices...
Reply-To: norcott_bill@tandem.com (Bill Norcott)
Organization: Tandem Computers, Inc.
Distribution: usa
Date: Fri, 11 Dec 1992 23:25:20 GMT

In article <1992Dec11.010613.12778@leland.Stanford.EDU>, underdog@leland.Stanford.EDU (Dwight Joe) writes:

|> In that price range, the Honda Civic is the finest car available for that
|> price, and on top of that, it is made in America.  Honda Civics and Accords
|> are a symbol of American excellence in engineering and manufacturing.
|> 

By the same logic, a McDonald's Big Mac is a symbol of Japanese
excellence in cuisine because I can fly over to Tokyo and get one that
is made there.

-- 
---------------------------------------------------------------------|
Bill Norcott			GUARDIAN POSIX project
Tandem Computers, Inc.		
10600 N. Tantau Avenue		PHONE:  (408) 285-3253
Cupertino, CA   95014		EMAIL: norcott_bill@tandem.com


Newsgroups: rec.autos
From: jgd@dixie.com (John De Armond)
Subject: Re: FORD TAURUS taillight RIPOFF!
Date: Wed, 16 Dec 92 08:33:11 GMT
Organization: Dixie Communications Public Access.  The Mouth of the South.

bqueiser@magnus.acs.ohio-state.edu (Brian J Queiser) writes:

>At the risk of turning this into rec.autos.houses . . .

Further risk.

>ago.  My parents-in-law built a brand-new home in an average Cleveland
>suburb about two years ago for just over $200,000.  It's got about 2500
>sq ft, not including the basement or garage and it sits on .5 of an acre.

I have 4500 sq ft in a ranch on two levels (finished basement).  Two
acres of land.  I paid $110k for it 5 years ago (BEFORE the housing
depression.)  Before that I had a 5000 sq ft house in Cleveland
Tn that I paid $67K for in 1985 and sold for $80k a couple years later.
Marietta is a bedroom 'burb of Atlanta.  What you folks in the north 
and on the left coast pay for housing is not "average."

>Most financial advisors advise the home buyer to finance double what they

You rely heavily in your post on what financial advisors say.  To slightly
modify a Ross Perot saying, "If the financial advisors know so danm much,
why aren't they all rich?"  In my book, a synonym for "financial advisor"
is "otherwise unemployed".

>The other thing is this:  More and more households today have two incomes.
>The market is adjusting to this continuously; maybe someday you're gonna'
>have to marry to make it.

Sorry guy, I don't buy off on claiming one's standard of living is 
improving when both spouses have to work.  In the 70s my wife stayed home.
Now we both have to work even though I'm a cheap bastard who never
pays list and who leverages his money better than anyone I know.

I'm sorry, no matter how you look at it, paying $20k or more for a car
and having to bust your hump to pay for it is crazy.  

John
-- 
John De Armond, WD4OQC               |Interested in high performance mobility?  
Performance Engineering Magazine(TM) | Interested in high tech and computers? 
Marietta, Ga                         | Send ur snail-mail address to 
jgd@dixie.com                        | perform@dixie.com for a free sample mag
Need Usenet public Access in Atlanta?  Write Me for info on Dixie.com.
Newsgroups: rec.autos,rec.autos.tech
From: brad@buck.viewlogic.com (Bradford Kellogg)
Subject: Re: When I turn, it gets noisy.....
Originator: brad@buck
Organization: Viewlogic Systems, Inc.
Date: Fri, 11 Dec 1992 22:38:22 GMT


In article <1992Dec11.113122.192@janus.arc.ab.ca>, erkamp@janus (Bob Erkamp) writes:
|> In article <9212080934.AA28233@enet-gw.pa.dec.com>, paulman@hkmeg1.enet.dec.com (HKO MANUFACTURING ENGINEERING  08-Dec-1992 1726) writes:

|> >Since last couple of weeks, it starts getting very noisy with a "long, 
|> >long" sound when I make a turn (say a right angle turn).   The faster I go, 
|> >the louder the sound.  However, I don't hear the noise when I am going 
|> >straight.   I can't locate the source of the noise, can anyone of you
|> >tell me what and why it is?
|> >
|> 
|> Possibly related to the front brakes (rubbing?). Does the noise go away/change 
|> when brakes are applied during turning?
|> 
A few possibilties come to mind:

1. Tires - uneven wear or incorrect pressure?
2. Wheel bearings - when worn, these make more noise on turns.
3. Alignment - have had this done lately?
Newsgroups: rec.autos
From: nau@ssesco.com (William Nau)
Subject: Re: *** Acura Integra LS 88 ***
Organization: SSESCO
Date: Wed, 16 Dec 1992 14:53:54 GMT

In article <1992Dec15.212720.24371@walter.bellcore.com>, jchen@wind.bellcore.com (Jason Chen) writes:
|> In article <SS.92Dec15143641@wpi.WPI.EDU>, ss@wpi.WPI.EDU (Scott Streeter) writes:
|> |> >>>>> On Tue, 15 Dec 1992 16:27:50 GMT, mlleung@neumann.uwaterloo.ca (Johnson Leung Man Leung) said:
|> |> 
|> |> mlleung> I have just seen an 88 Acura Integra LS (automatic) with
|> |> mlleung> 121,000 km, and fully loaded with A/C, pw, pdl. It asks for
|> |> mlleung> Can$6300. Can anybody comment on this? Thanks.
|> |> 
|> |> Comment? Ya. Don't buy it. Too many miles on it for that price...
|> |> 
|> 
|> 121k km = 75k miles, in case you missed it. It is certainly reasonable for
|> a 5 year old car.

This damn metric crap throws me every time.  I also didn't see the Canadian
dollars.  What's that about $5800 American.  Let's see.  The car was probably
purchased for about $13000 (American) back in 1988.  Three fourths of it's 
life is gone.  That knocks it down to a value of about $3250.  Not to 
mention that this will be the worst fourth of it's life.  However, it is
quite possible that it will last longer, with enough repairs.  I would
pay $2500.  Whoops, I forgot how overpriced used Acura's and Honda's are.
Let' see figure in the artificial inflation due to the Acura name and
$5800 seems to be about right.

[ok, I'm a sarcastic bastard]
-- 
William R. Nau
Supercomputer Systems Engineering and Services Company (SSESCO)
511 11th Avenue South, Suite 216
Minneapolis, Minnesota 55415-1536
(612) 342-0003

nau@SSESCO.com
From: zenith89@bcarh1eb.bnr.ca (Chris VanFleet)
Newsgroups: rec.autos
Subject: Re: WHAT GM to Buy?
Date: 18 Dec 92 16:15:49 GMT
Reply-To: zenith89@bcarh1eb.bnr.ca (Joan McIver)
Organization: Bell-Northern Research, Ltd., Ottawa, CANADA

In article <1992Dec18.025053.1@vax.sonoma.edu> oberland@vax.sonoma.edu writes:
>I need help.
>
>My father has a friend who is in her 70's(should be around for 10-15 more
>years, though).  She wants a nice car.
>She will only consider GM cars.
>V-6 is a plus
>Luxury cars are OUT, as she wants to spend as little as possible.
>Small cars are out as well, a are sporty cars
>Any suggestions?(I told her to get an import or a 1-2 year old Volvo sedan)
>She won't buy an import, and won't buy anything but GM.
>
Thats one smart lady. And as for you suggesting an import, well...
I won't waste any more bandwidth on THAT subject.
Try one of the remaining "A" body cars, ie. Olds Cutlass Cierra or
Buick Century. Excellent cars in every way... that meet most of the 
specs you listed.
Newsgroups: rec.autos
From: Tom Wetzel <twetzel@ucs.indiana.edu>
Subject: Re: Last U.S. Made Corvette Slated for 1995
Organization: Indiana University
X-Useragent: Nuntius v1.1
     <1992Dec16.005117.10659@newsgate.sps.mot.com>
Date: Wed, 16 Dec 1992 19:19:35 GMT

In article <1992Dec14.091047.3583@scott.skidmore.edu> Jason Reiser...
Asleep, jreiser@scott.skidmore.edu writes:
>If the last US vette is worth anything as a collectors item, it will
>only be because we have the foresight to know that it is the last.
>Look at the other Vette lasts... '76 was the last Stingray, '77 was
>the last small rear window style, etc... and these aren't particularly
>valuable.  Maybe in the future, but not just yet.  Sure, people will
>buy up these when they become available, dealers will rape the
>customers, and within a year, people will be dumping these as failed
>investments to get something else.  That's when you buy your long term
>investment... not at the dealer (look at the ZR1 for and example of
>this one)
>
>				- Jason


I think the only "instantly collectable" Vette was the '78 pace car.  
Remember how the prices shot through the roof?  And, you are correct
when you say they will be failed investments in the short run.  Again,
the '78 PC experience supports this.  The Vette was one of the 
defining cars of the 1960s and now that the kids of that time have 
reached middle age, those who are inclined toward buying classic <old>
cars have driven the price of the 63-67 Vettes out of sight.  I don't
know how collectable they are but they appear to be in demand.  I don't
know if the 1970's had a car like the Vette that was part of the popular
culture.  Perhaps the VW Microbus???.  But music groups didn't sing about
their cars in the '70s.  

There are those who say the last true Vette was the '62, the last 
straight axel car.  I note that the National Corvette Restorer's Society
has now included the 68-77 models in its programs.  The "hot" cars now
seem to be the 70, 71, & 72 LT-1 cars.  I guess we will have to wait 
unitl about 2015 to know if the 95 Vette became a collectable.  I agree
with you about the investing cycle.  Most people don't invest for the
long run and are looking to turn a quick profit.  They get discouraged
easily - especially if they are investing with the rent money.

Tom
From: c23st@kocrsv01.delcoelect.com (Spiros Triantafyllopoulos)
Newsgroups: rec.autos
Subject: Guns and Axles (was Re: OLDsmobile name change)
Date: 16 Dec 92 14:14:00 GMT
Organization: Delco Electronics Corp.

In article <2344@shaman.wv.tek.com> andrew@frip.wv.tek.com writes:
>>Did GM just pay off Beretta Arms Company? I never heard anything about
>>Colt Arms Company or Colt Malt Liquor suing Chrysler for the DODGE COLT.
>
>They would have no basis for doing so.  Trademark law makes a
>distinction between unique words like "Beretta" and common words like
>"Colt."  The latter can be used as a mark on multiple products that
>cannot be confused by the common consumer.  (You would be unlikely to
>confuse a car and a gun.)

Man, where were you a few years ago when Berreta Arms SA got upset with
the Chevy Beretta? We would not have spent all that effort in the 
court :-)

I don't know what arguments the Italians used; but the thing ended with
some settlement donated to charity, the president of Beretta Arms SA
receiving a Chevy Beretta, and the president of GM receiving a couple
of collectors' edition Beretta handguns.

If I remember my car magazine right (this was in the Beretta vs. Beretta
comparison in one of them) the arguments used were pretty much what you
said, that gun names have been used as car names before...

Spiros 
-- 
Spiros Triantafyllopoulos                    c23st@kocrsv01.delcoelect.com
Software Technology, Delco Electronics       (317) 451-0815
GM Hughes Electronics, Kokomo, IN 46904      [A Different Kind of Disclaimer]
From: carl@Cayman.COM (Carl Heinzl)
Newsgroups: rec.autos
Subject: Re: Sales slime lies (was Re: Chevy truck doors)
Date: 14 Dec 92 19:08:48 GMT
	<1992Dec10.053127.13538@cbnewsc.cb.att.com>
	<1992Dec11.034129.17330@leland.Stanford.EDU>
Distribution: usa
Organization: Cayman Systems Inc., Cambridge, MA
In-reply-to: tedebear@leland.Stanford.EDU's message of 11 Dec 92 03:41:29 GMT
bcc: carl


>is there any possibility that the VW engine of was indeed made
>in the U.S.?  VW had a plant in pennsylvania for a while, but
>i can't remember exactly when and whether they were turning out
>engines, too.

Yes, VW had a plant in New Stanton, PA which is about 40 miles (south
or southeast) from Pittsburgh, PA, but I'm pretty sure that it's been
closed for several years now.

I worked one summer at the Westinghouse Advanced Reactor Division
('79) which was just down the road (~7 miles).  The stretch of the
interstate that I had to drive on was for quite some time the
"dealiest stretch of interstate in the nation" having recorded the
highest fatalaty rate.  Of course, that was back in '79.  I don't know
if the road has been rebuilt or anything was done to address this,
other than the substantial loss of jobs in that area :^( ...

-Carl-
--
Newsgroups: rec.autos
From: eliot@lanmola.engr.washington.edu (eliot)
Subject: Re: Four wheel drive Autos
Organization: clearer than blir
Date: Wed, 16 Dec 1992 18:17:29 GMT

In article <1gma36INN8jp@uwm.edu> qazi@csd4.csd.uwm.edu (Aamir Hafeez Qazi) writes:

>--I applaud Subaru for designing the goofy windows for the SVX.  It is
>  one of the things that makes the car DIFFERENT and UNIQUE - and not in
>  such a bad way either.  Here is an upmarket Japanese car that needs no
>  gold-plated badges to make it stand out and be noticed!!!

i was pretty neutral about the svx windows when i first got into the
driver's seat.  but after a few miles i found that the middle dividing
line quite bothersome.  it wouldn't have prevented me from buying the
car if i really liked it, but overall the car wasn't all that
impressive even though i found it to be refreshingly different
from the typical run of the mill japanese luxo-koop.

>  Granted, I never drove an SVX, and I can
>  understand that some people may be terminally bothered by these windows.
>  However, I think that sales are poor due to Subaru's economy-car image.

yes, i would agree with that.

>  I can bet that people who liked the concept of the Audi Coupe
>  Quattro will start writing checks instantly.  

the svx is no audi quattro.  repeat.  the svx is no audi quattro.  the
only thing it has in common is that it has AWD and 2 doors.  other
than that it is as different in personality as night and day.  the
only car that is remotely close to the quattro coupe in terms of raw
excitement (if not the ultimate finesse) is the mitsu eclipse/eagle
talon.  you should go drive *the* quattro coupe some time.  it is 
a religious experience.

>  This car is too good to be killed so soon.  Sales are so poor that, as
>  pointed out, no '93 models are going to be imported.

that is quite sad.  interesting unusual cars always seem to get axed.
i guess it is understandable why the japanese and europeans keep their
most exciting stuff away from these shores.  the land that regards the
camry/accord as perfection.  ugh!


eliot
From: cew6@po.CWRU.Edu (Carlin E. Wiegner)
Newsgroups: rec.autos
Subject: Florida Dealer's (west cost)
Date: 14 Dec 1992 21:21:12 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: slc10.ins.cwru.edu


I'm going to the east cost (why did I say west coast in the
header?) for winter break and was wondering if there are any
nice dealerships in West Palm Beech. Looking at primarily
Ferrari, Porsche, Lotus, Lambs, and other exotics. thanks for
the email replies....
CW
From: hhtra@usho72.hou281.chevron.com (T.M.Haddock)
Newsgroups: rec.autos
Subject: Re: HUMVEE
Date: 15 Dec 92 16:53:47 GMT
Organization: Chevron

In article <1992Dec15.031836.2721@microsoft.com>, beng@microsoft.com (Ben Goetter) writes:
|> In article <adamsd.724225101@crash.cts.com> adamsd@crash.cts.com (Adams Douglas) writes:
|> | 
|> | So what did an actual military Humvee cost the US Govt.?
|> 
|> My source (an old magazine article) says $28,500.

 Well... you too could get it for that, if you bought 
 several thousands of them.  :)

 TRAVIS
From: rrw@.cse.nau.edu (Bob Wier)
Newsgroups: rec.autos
Subject: battery rec?
Date: 18 Dec 92 06:02:52 GMT
Distribution: usa
Organization: Northern Arizona University, Flagstaff AZ
Originator: rrw@sunset.cse.nau.edu

After a cold night last night, it is starting to look
like I may be needing a new auto battery (couldn't
start car this morning, but after warming up for 6
hours it started ok).  The battery is original equipment
about 4.5 years old now, so it's probably time.

Since I make heavy electrical demand on the system
(driving lights to spot deer/elk and run a variety
of radio transmitting equipment) I wonder if anyone
can suggest a specific brand of heavy duty battery.

I've called around a bit here (Flagstaff is not a
big place) and found one called a "sub-zero" from
a chain ("auto zone") with a 6 year warranty at a
pretty reasonable price ($55 with core exchange).

This is for an '88 Jeep Cherokee.

Drop me a note and I'll summarize if worthwhile.
THANKS!

- Bob Wier

  ---------- insert favorite standard disclaimers here ----------
                   College of Engineering
      Northern Arizona University, Flagstaff Arizona
  Internet: rrw@naucse.cse.nau.edu | WB5KXH | fax:602 523 2300
.
Newsgroups: rec.autos
From: kenny@osf.org (Kenneth Crudup)
Subject: Re: SHO Electrical Troubles
Organization: Open Software Foundation
Date: Fri, 18 Dec 1992 23:08:56 GMT

In article <15992@auspex-gw.auspex.com>
tpickett@auspex.com (Tom Pickett) writes:

>My SHO failed its smog check yesterday.  The egr switch is faulty.
>Should I bother fighting it out with Ford?

...ask Phil Greenspun at MIT.... :-)

	-Kenny

-- 
Kenny Crudup, Contractor, OSF DCE QA
OSF, 11 Cambridge Center, Cambridge, MA 02142	+1 617 621 7306
kenny@osf.osf.org			OSF has nothing to do with this post.
	  Religion: The longest-running gag ever played on Mankind.
Newsgroups: rec.autos