Back in those days, that was quite a lot of memory. An entire megabyte was an amazing luxury. My high school's PDP-11/34 was maxed out with 128Kwords (256 KB), and it was configured for at least 12 (maybe 16) users, with up to 56 KB user memory + 8 KB of run-time system per user and swapping handling the overload. But, back then, memory was an expensive luxury - that KIM-1 had all of 1K, so you had to make every byte count.