QNX 4.5 We ran our POS systems on it (server-thin dumb client) - the server was a 64MB 486 and the POS terminals ran a simple client program that emulated an N

QNX 4.5 We ran our POS systems on it (server-thin dumb client) - the server was a 64MB 486 and the POS terminals ran a simple client program that emulated an NCR1255 POS terminal. It just sent keystrokes or print a line on a receipt printer or display a message. The server was a C program with a giant state machine of up to 64 POS terminals and it hardly broke out in a sweat and used shared memory to talk to other programs that did the card payments and data storage. Good times.