This document by Ken Polsson "is an attempt to bring various published sources together to present a timeline about Personal Computers." The author has posted this document online as he continues to work on a book project, for which he has browsed extensively through various sources for historical information related to personal computers. The document provides a brief summary of "the essential happenings that shaped the industry." The full text, which contains close to 3,000 entries, is available for purchase. This online document represents the start of the timeline "to show you the quality of the material" and begins in 1947 with the invention of the point-contact transistor amplifier by three scientists at Bell Telephone Laboratories and ends in December, 1977 with a victory by Microsoft in an important legal battle against Pertec, on ownership of the BASIC software Bill Gates and Paul Allen wrote and licensed to MITS. The references are listed in a separate file, which is also available online.