The History of Software Patents
A history of how software went from unpatentable to patentable.
http://www.bitlaw.com/software-patent/history.html

Usenet Software: History and Sources
Short essay on the development of Usenet architecture.
http://www.faqs.org/faqs/usenet/software/part1/

History of Computing: Software Index
Taxonomy of many kinds of software, with historical perspective.
http://www.thocp.net/software/software.htm

Visicorp 1978-84
A business school case study detailing the history of electronic spreadsheet pioneer Visicorp.
http://www.anderson.ucla.edu/faculty/dick.rumelt/Docs/Cases/Visicorp.pdf

Stottler Henke - Artificial Intelligence History
Brief history of artificial intelligence, especially expert systems
http://www.stottlerhenke.com/ai_general/history.htm

The Vintage Mac Museum
Screenshots of vintage Macintosh software.
http://www.d4.dion.ne.jp/~motohiko/

PostgreSQL History Document
Capsule history of POSTGRES-related database management systems.
http://archives.postgresql.org/pgsql-advocacy/2004-12/msg00033.php

Software Memories
Historical articles about the enterprise software industry, its companies, and its pioneers.
http://www.softwarememories.com/

Tincat Group, Inc.— MultiValue Family Tree
Family tree "poster" and timeline for multivalue (PICK and U2) database management product lines.
http://www.tincat-group.com/mv/familytree.html

Dan Bricklin's History Section
By Dan Bricklin, co-inventor of Visicalc
http://www.bricklin.com/history/intro.htm

System R History
Includes oral history transcripts about System R and SQL. From 1995.
http://www.mcjones.org/System_R/

Information Technology Corporate Histories Collection
History of various IT companies, especially enterprise software vendors. Affiliated with the Computer History Museum.
http://www.computerhistory.org/corphist/index.php

CORBA history
Critical history of the CORBA standard for object request brokers.
http://acmqueue.com/modules.php?name=Content&pa=showpage&pid=396&page=1

Beer and Nappies -- A Data Mining Urban Legend
Article debunking the beer-and-diapers data mining urban legend.
http://web.onetel.net.uk/%7Ehibou/Beer%20and%20Nappies.html

PowerBuilder History
Idiosyncratic history of PowerBuilder and other client/server development tools.
http://pbdj.sys-con.com/read/124571_1.htm

Powersoft History
Capsule history of PowerBuilder, with a scan of a product advertisement.
http://www.lannigan.org/powersoft_powerbuilder_history.htm

DBMS Magazne Interview - August 1995
Founder Mitchell Kertzman discusses the history of Powersoft.
http://www.dbmsmag.com/int9508.html

SiliconUser
Articles about technology history with an Apple orientation.
http://siliconuser.com/

The Hard Work of Software History
Paper on the challenges and techniques of preserving software history, by a Stanford University curator.
http://www.ala.org/ala/acrl/acrlpubs/rbm/backissuesvol2no/lowood.PDF

The Technology and Business of ObjectStore
Detailed two-part history of Object Design, maker of object-oriented database management system ObjectStore.
http://dlweinreb.wordpress.com/2007/12/31/the-technology-and-business-of-objectstore/

Outliners & Programming
Dave Winer on the history of some early personal computer software products.
http://davewiner.userland.com/outlinersProgramming