I learned C and IBM APL2 around the same time for financial apps. For APL, i read the Polivka and Pakin book about 30 times, not this edition, but the red paperback I used is apparently impossible to buy. Excellent book, it got me to where i could be competitive in obfuscated APL contests: https://www.amazon.com/P-L-Prentice-Hall-automatic-computati...

Is this the book? http://www.amazon.com/P-L-Prentice-Hall-automatic-computatio... or this http://www.amazon.com/Edition-Polivka-Raymond-published-Pren...