A Brief History of Programming Languages  
   A special Byte Magazine article published for Byte's 20th anniversary special report
   http://www.byte.com/art/9509/sec7/art19.htm

Java: Cornerstone of the Global Network Enterprise?  
   Brian Youman's paper on Java including some historical notes: "Java: Cornerstone of the Global Network Enterprise?"
   http://ei.cs.vt.edu/~history/Youmans.Java.html

A Computer Languages (diagram)  
   A Computer languages timeline, 1954 to present, printable chart. Includes links to home page for many languages.
   http://www.levenez.com/lang/

Diagram of Languages  
   Two diagrams showing how many languages are related to each other.
   http://merd.sourceforge.net/pixel/language-study/diagram.html

Historic Documents in Computer Science  
   Original, historic first documents for many early programming languages, like language manualsa, scanned and converted to PDF form.
   http://www.fh-jena.de/~kleine/history/

Comment Statements  
   The history and use of comments in programming languages, from the beginning of programming to the present day.
   http://www.gavilan.edu/csis/languages/comments.html

Literals  
   The history and use of literals (or constants) in programming languages, from the beginning of programming to the present day.
   http://www.gavilan.edu/csis/languages/literals.html

Wikipedia: PL/I  
   An encyclopedia description of PL/I history with many links to programming terms.
   http://en.wikipedia.org/wiki/PL/I_programming_language

C++ History  
   A researched article about the history of the C++ programming language, including information provided by Bjarne Stroustrup. Bibiliography and related links.
   http://www.hitmill.com/programming/cpp/cppHistory.asp

The History of Computer Programming Languages  
   Short concise article on programming language history with some links.
   http://www.princeton.edu/~ferguson/adw/programming_languages.shtml

Java, timelines  
   A short history of early Java from 1991 to 1995.
   http://ils.unc.edu/blaze/java/javahist.html

History of Ada  
   Contains a large number of links to historical documents and notes about early Ada.
   http://www.adahome.com/History/

Visual Programming Languages: A Survey  
   This paper by Marat Boshernitsan includes an historical overview of some of the pioneering efforts in the field.
   http://www.cs.berkeley.edu/~maratb/cs263/

Timeline of computer history - Software and Languages  
   Has many links to important events in programming language history.
   http://www.computerhistory.org/timeline/timeline.php?timeline_category=sl

History and Comparing Programming Languages  
   The files at this site compare programming language statements in several different languages tracing the statement from early languages to present languages.
   http://www.gavilan.edu/csis/languages/history.html

Web Programming Languages  
   Characteristics, alternatives and history of programming languages for the Web - insight into the context in which each language is used.
   http://www.freelance-help.com/web-programming.php

Pascal history  
   A brief look at the birth, life, and death of the Pascal programming language.
   http://www.taoyue.com/tutorials/pascal/history.html

Parentheses  
   The history and use of parentheses in programming languages, from the beginning of programming to the present day.
   http://www.gavilan.edu/csis/languages/parentheses.html

Labels  
   History and use of labels in programming languages, from the beginning of programming to the present day.
   http://www.gavilan.edu/csis/languages/labels.html

UNIX  
   A UNIX history page with many links to UNIX people and links to papers about early UNIX.
   http://www.levenez.com/unix/