Menu
Home
People
Places
Arts
History
Plants & Animals
Science
Life & Culture
Technology
Reference.org
IBM SSEC
open-in-new
<p>The IBM Selective Sequence Electronic Calculator (SSEC) was an <a href="/facts/Electromechanical_computer/4TvyCu8c">electromechanical computer</a> built by <a href="/facts/IBM/QszA7nwd">IBM</a>. Its design was started in late 1944 and it operated from January 1948 to August 1952. It had many of the features of a <a href="/facts/Stored-program_computer/CwcIk5S8">stored-program computer</a>, and was the first operational machine able to treat its instructions as data, but it was not fully electronic. Although the SSEC proved useful for several high-profile applications, it soon became obsolete. As the last large electromechanical computer ever built, its greatest success was the publicity it provided for IBM. </p>