This document defines key computer and technology terms in 3 sentences or less each, including binary, bit, blog, byte, conversions, comparisons to storage sizes, CD-Rom, cell, CPU, cursor, disk drive, download, e-mail, field, gigabyte, HTML, icon, Internet, modem, monitor, network, operating system, processor, RAM, RSS, scanner, URL, virus, Web 2.0, wiki. It also provides a brief summary of a paper about 21st century learning environments needing more flexibility than traditional industrial age school models.