The Blacksmith and the Bookkeeper at java.net

java.net is full of wonderful articles. This 3 installment article is such one.

It's a article with serious thoughts, I think. It's interesting, too. Read this (I just copy and paste it):
The on-board Apollo Guidance Computer (AGC) was about 1 cubic foot with 2K of 16-bit RAM and 36K of hard-wired core-rope memory with copper wires threaded or not threaded through tiny magnetic cores. The 16-bit words were generally 14 bits of data (or two op-codes), 1 sign bit, and 1 parity bit. The cycle time was 11.7 micro-seconds. Programming was done in assembly language and in an interpretive language, in reverse Polish. Scaling was fixed point fractional. An assembly language ADD took about 23.4 micro-seconds. The operating system featured a multi-programmed, priority/event driven asynchronous executive packed into 2K of memory." -- Apollo 11: 25 Years Later by Fred H. Martin, Intermetrics, Inc., July 1994
For short it's about an OS within 2K memory! Totally crazy from today's point of view :-)
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