D
My first was an IBM, around 1976. Just don't know which one. I do know that it took an entire building at UW-Madison to house it. Nothing like sitting at a card punch machine at midnight, trying to find the syntax error in a Fortran card deck.My first computer in '76
IBM System/32 - Wikipedia
My second computer in '78
IBM System/34 - Wikipedia
Job change - My third computer that was converted to System/34 circa '80
IBM System/3 - Wikipedia (System/3 Model 10 both disk and 96 column cards)
Job change (SW Bell Telecom > AT&T) - My fourth circa '86
IBM System/36 - Wikipedia We had 14 of these - two larger ones at the corp office (development and production), and 10 smaller ones in the 10 regional offices. Programs and data were transfered by modem.
My fifth circa '87 - replaced all of the System/36 machines. Regional offices connected to corp on leased lines.
IBM System/38 - Wikipedia
Also added a DEC VAX that ran one application that later converted to the S/38
My sixth circa '90 to my retirement in '09 We had two machines - smaller for development, larger for production.
IBM System i - Wikipedia (and the various iterations and name changes)

Glad I had taken typing in high school, but those were more difficult than any typewriter I ever tried. Cured me of wanting to get to know computers until the Compaq Portable appeared in '82. Now that was fun!
