Image of a 1973 multi-mini computer database server

AI Thread Summary
The discussion highlights the advanced technology of a 1973 multi-mini computer database server, featuring multiple HP 2100 mini-computers and a database server supporting 160 users. Each mini-computer utilized a 10 MB hard drive for message queuing and was complemented by ten 80 MB disk drives. The setup included a multiplexor for dedicated telephone lines and a paper tape photo reader. The participant reminisces about their early programming experiences, including using a Wang 700 and 720C, and the innovative techniques employed to optimize memory usage in programming. The conversation reflects nostalgia for early computing experiences and the evolution of technology over the decades.
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This was an advanced system at the time (1973), my first programming job. Multiple HP 2100 mini-computers (1 is HP 2116), each computer mult-tasking, a database server for 160 users at the time I left the company. Underneath each mini-computers is a 10 MB hard drive used to queue messages between computers, and ten 80 MB disk pack type disk drives. On top is a multiplexor for dedicated telephone lines and a paper tape photo reader (600 characters per second). I couldn't find the image for the other side of the room that had more stuff.

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I remember using the Wang 700 with nixie tube display for Lab work as undergrad. Almost turned me into a Computer Geek. Happily (for me) the physics force was stronger
 
I used a Wang 720C in 1972 that had a type ball printer that could be used as a plotter since the paper feed drum could move up or down. Wrote a cassette tape loader that would load a program via a number entered by the user. To minimize memory, it used a call to the routine that would do a load and execute that would repeat until a matching number was found, then return to a load and execute, so only using 2 instruction spaces for the call and the load and execute. In high school, we had a Monrobot (drum memory) in 1967, then an IBM 1130 (conventional mini-computer) in 1968 to 1970, plus Saturday sessions at an IBM data center in Los Angeles using low end IBM 360 mainframes. I also spent some time in 1969 and 1970 at a CDC data center, mostly 3150, and got to see a 6600 in action (it had a cool vector graphics monitor), got to run a couple of programs on the 6600 when there was an open time slot.
 
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It's come to this. A bunch of old guys talking about how they used their Wangs in the old days. <sigh>
 
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