In 1971, Intel introduces the 4004, the world's first microprocessor chip.	1978: TI's Speak & Spell learning aid for children.	1977's Apple II is the dramatically enhanced sibling of Apple's first PC, 1976's Apple I.
The Skylab 3 command module orbits the Earth in 1974.	Enjoy music while on the go in 1979 with this Sony headphone stereo Walkman.	The HP-35, the first scientific pocket calculator, announced by Hewlett-Packard in 1972.