<Dd> IBM 's first large - scale digital calculating machine , the Selective Sequence Electronic Calculator , is announced . The SSEC is the first computer that can modify a stored program , and featured 12,000 vacuum tubes and 21,000 electromechanical relays . </Dd>
<Dd> IBM 's first large - scale digital calculating machine , the Selective Sequence Electronic Calculator , is announced . The SSEC is the first computer that can modify a stored program , and featured 12,000 vacuum tubes and 21,000 electromechanical relays . </Dd>
what was the name of the first ibm computer
what was the name of the first ibm computer
SSEC
SSEC