Definition: A blank character often indicating that the cursor or print head should move to the next tab stop, leaving blank space in between. In applications that do not use tab stops, a tab usually indicates that several blank spaces should be inserted; the number inserted depends on configuration settings.
Source: High Definition: A-Z Guide to Personal Technology. Boston: Houghton Mifflin, 2006. Credo Reference. Web. 03 August 2012.