Author Topic: CAN YOU GUESS WHAT THIS IS ?  (Read 3926 times)

Offline Texas Mac Man

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CAN YOU GUESS WHAT THIS IS ?
« on: January 22, 2007, 10:36:31 AM »
It's 50 years old and used on a computer.  


 

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It's a 5MB hard disk in 1956....  
 
In  September 1956 IBM launched the 305 RAMAC (Random Access Method of Accounting and Control) , the first computer with a hard disk drive (HDD). The HDD weighed over a ton and stored 5MB of data.  

More info on the RAMAC
Makes you appreciate your 4 GB USB thumb drive, doesn't it?
Cheers, Tom

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Offline gunug

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« Reply #1 on: January 22, 2007, 10:42:04 AM »
I had a DEC PDP-11 in my work area at KU in the late 70's/early 80's with a 5MB hard drive with 12" platters that weighed enough to crack the concrete floor when the hanger hardware failed.  This thing wouldn't work inside the rack (too much heat) but would work with the drive pulled out on the hangers.  I bet that it weighed 80 pounds at least!
"If there really is no beer in heaven then maybe at least the
computers will work all of the time!"

Offline jcarter

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« Reply #2 on: January 22, 2007, 10:48:46 AM »
Heavens, I too remember these IBM things.  They were aboard the research ship that I was on, and when the weather got rough or the temperature got too hot(south) for the AC to handle, we had to shut the whole shebang down.  
I do have pictures, slides, if I could ever find them.
Jane

Offline jwboyd

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« Reply #3 on: January 22, 2007, 12:42:51 PM »
When my son went to work for HP (mid 1980s). a one-megabyte memory module was carried on their books as a capital asset worth $1,000.
I'm not a complete idiot -- a few parts are missing!

Offline ()

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« Reply #4 on: January 22, 2007, 01:05:45 PM »
imagine having that on your desktop, and then trying to format it?

Offline Gregg

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« Reply #5 on: January 22, 2007, 01:08:45 PM »
Wow!

I remember the air conditioned computer room at college. I'm sure many here have similar memories. The world is getting smaller!
Ya gotta applaud those bunnies for sacrificing their hearing just so some guy in Cupertino can have better TV reception.

Offline Texas Mac Man

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« Reply #6 on: January 22, 2007, 01:49:52 PM »
I graduated from the University of Texas - Austin in 1958. At that time, the entire Engineering School only had one computer - a Heathkit analog computer that students purchased with donations and assembled. The computer was used for stress analysis. As engineering students, we had our slide rules & our fingers/toes (& brain) for computing.

The Administration department did have some IBM computers that were used for keeping students records, class assignments, grades, etc.

If you could equate you brain's memory into MB or GB, I wonder how many MB/GBs of memory we have? I know one thing, I must have a few bad blocks & my memory access time seems to get longer. Maybe my hard drive, or brain, is getting full, or some Preference files or Permission files have become corrupted.
Cheers, Tom

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« Reply #7 on: January 22, 2007, 01:59:12 PM »
and yet people still complain... nono.gif

 go figure! Thinking.gif

Computer technology has improved greatly, but people are always wanting more, better, faster, virus free, eass OS's and programs to use... Thinking.gif

Offline D76

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« Reply #8 on: January 22, 2007, 02:18:31 PM »
QUOTE(Nutterbutter @ Jan 22 2007, 02:59 PM) [snapback]116683[/snapback]
. . . people are always wanting more, better, faster, virus free, eass OS's and programs to use...
My OSs have been virus free since 1989.  biggrin.gif

Offline jguti

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« Reply #9 on: January 22, 2007, 06:49:25 PM »
Mama moose,

I don't suppose this is something you would ship for free to anyone who needed one. tongue.gif

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« Reply #10 on: January 22, 2007, 07:38:30 PM »
Good one jguti... Devilish2.gif

Offline RHPConsult

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« Reply #11 on: January 22, 2007, 10:52:35 PM »
Wish I could find a picture of the Xerox machine I leased for my office in the early '60s. It must have weighed 500 lbs.

It was L shaped, about the size of a large fridge, lying on its side.

Since it replaced mimeograph as well as that purple "Ditto" duplication, everyone thought it was wonderful . . . even though it broke about twice a month. But, nevermind, we had a Xerox service guy assigned to just our building, if you can believe it, so we were seldom really inconvenienced.

Hard to believe!
« Last Edit: January 22, 2007, 10:53:56 PM by RHPConsult »

MamaMoose

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CAN YOU GUESS WHAT THIS IS ?
« Reply #12 on: January 22, 2007, 11:54:41 PM »
My first computer at Westinghouse Atomic Power was an IBM 650. In 1955, the only memory we had was a 1000 word rotating magnetic drum. It had a bi-quinary (5+5) basis, punched cards for a crude memeory, and an 8080 accounting machine with a plug board for printing output. There was no symbolic language (assembly, higher level, etc.)  just binary machine language. It was in a room of about 20' by 25' with a false floor to carry all the cables. The vacuum tubes gave off so much heat that a 5 ton equivalent air conditioning system was necessary.

With that machine we performed nuclear reactor physics calculations and designed the reactors for nuclear submarines!! Its a wonder they worked. Now 52 years later, I carry around a 4 GB USB Flash Drive and a laptop that is  roughly 1, 000.000 times more powerful and it weighs just 5+ pounds.

Just think the revolution in computers came about because of the US space program which drove microchips, software, batterys, circuit design, etc.

Ain't technology grand!

MamaMoose
« Last Edit: January 23, 2007, 11:04:38 AM by Xairbusdriver »

Offline Steve_J

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« Reply #13 on: January 23, 2007, 12:36:26 AM »
Anyone remember core memory and schmoo (sp) curves? Or SDS computers which became XDS computers which became Xerox computers?
Steve

"In a world without walls and fences, who needs Windows and Gates."
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Offline D76

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« Reply #14 on: January 23, 2007, 01:52:48 AM »
QUOTE(MamaMoose @ Jan 23 2007, 12:54 AM) [snapback]116752[/snapback]
My first computer at Westinghouse Atomic Power was an IBM 650. In 1955, the only memory we had was a 1000 word rotating magnetic drum.
You may have run across on the net the story of Mel, a real programmer,  here and here and here, three of countless copies. Supposedly, it was posted to a usenet site in 1983. It's a terrific story.

The first link above is to a page that's easier to read than the second if free verse is bothersome (and maybe something is changed), with an explanation at the bottom allegedly by the original poster.
QUOTE
[1992 postscript --- the author writes: "The original submission to the net was not in free verse, nor any approximation to it --- it was straight prose style, in non-justified paragraphs. In bouncing around the net it apparently got modified into the `free verse' form now popular. In other words, it got hacked on the net. That seems appropriate, somehow."]
The third one has this at the bottom:
QUOTE
[Posted to USENET by its author, Ed Nather , on 1983-05-21]
I ran a search of "Ed Nather" and came up with a ton of hits.

This link is to an article on the IBM 650.
QUOTE
The IBM 650, on the other hand was designed to be affordable and easy to use. And compared to what else

was available in the late 1950's, the IBM 650 was:

    * cheap: It only cost a half a million dollars.
    * small: It fit in a single room.
    * user friendly: It was programmed in decimal rather than binary.

IBM sold nearly two thousand units of the IBM 650, and it was the first computer to make a significant profit for its manufacturer.
I remember reading years ago about IBM selling two models of the same mainframe, the first being upgradable to the power of the second model, at a cost of thousands of dollars.

It turned out that when the customer forked over the cash, a programmer would work on the computer for hours upgrading it. According to the story, though, all the programmer really did was throw a single switch that had crippled the thing, then waste hours of time.

Who knows if it's true, though I suspect it is. My first VCR was like that. The difference between two models was some dollar figure that I can't recall after 20 years. But the only real difference was one extra button on the otherwise identical remotes that would eject the tape.
« Last Edit: January 23, 2007, 02:06:22 AM by D76 »