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Computers using vacuum tubes as their electronic elements were in use throughout the 1950s, but by the 1960s they had been largely replaced by transistor-based machines, which were smaller, faster, cheaper to produce, required less power, and were more reliable. The first transistorised computer was demonstrated at the University of Manchester in 1953.[31] In the 1970s, integrated circuit technology and the subsequent creation of microprocessors, such as the Intel 4004, further decreased size and cost and further increased speed and reliability of computers. By the late 1970s, many products such as video recorders contained dedicated computers called microcontrollers, and they. | 100 ONE HUNDRED PERCENT COMPREHENSIVE Kabir has done it again The Apache Server 2 Bible is an invaluable reference for both beginning and experienced administrators. Elizabeth Zinkann Sys Admin Magazine Contributing Editor and Review Columnist ONE HUNDRED PERCENT Mohammed J. Kabir Author of Red Hat Linux Server AUTHORITATIVE WHAT YOU NEED Configure Apache Server for a Linux Unix or Win32 system Leverage Apache using SSI CGI PHP Perl and Java servlets Secure your site using SSL certificatesigning services and other tools BONUS CD-ROM Apache PHP Perl Tomcat MySQL and more Apache Server 2 .