I had bought a Radio Shack TRS-80 16K - Level II. That's 16 KB memory! It had a Z-80 processor and a Basic language interpreter. It cost me $779, i.e. less than the printer! I modified it by adding memory and also adding a memory chip to the display circuitry so it displayed lower case letters.
At that time I was working for IBM developing code for (4700) controllers that operated devices at bank branches. The controllers were connected to IBM mainframe computers at bank processing centers via modems. The banks had Apps that ran on these controllers and communicated with bank staff on various terminals, put stuff out om printers, etc. Bank transaction data would then be sent to bank's mainframes. You can look at 4700 System Overview to get a feeling of what the system was like.
But the development work was on IBM mainframes on VM/370 system while using 3270 terminal. In later years when I had the IBM PC it was possible to use a modem and work from home.
At that time I was working for IBM developing code for (4700) controllers that operated devices at bank branches. The controllers were connected to IBM mainframe computers at bank processing centers via modems. The banks had Apps that ran on these controllers and communicated with bank staff on various terminals, put stuff out om printers, etc. Bank transaction data would then be sent to bank's mainframes. You can look at 4700 System Overview to get a feeling of what the system was like.
But the development work was on IBM mainframes on VM/370 system while using 3270 terminal. In later years when I had the IBM PC it was possible to use a modem and work from home.