programming languages (electronic computers)

You should learn a programming language every year, as recommended by The Pragmatic Programmer. But if one per year is good, how about Seven Languages in Seven Weeks? In this book you'll get a hands-on tour of Clojure, Haskell, Io, Prolog, Scala, Erlang, and Ruby.

Contains glossary, index, and bibliography. Discusses the history and development of programming for computers and includes four essays.