4. 1972-Handheld Calculator
1970's The Pocket
Calculator
Revolution.
December 1972-
patent of first
handheld calculator
four function model $150
5. 1972- The Scantron System of Testing
Invented by Michael
Sokolski soldier,
engineer, and
inventor. It provides
convenience for
teachers in checking
and scoring test.
6. 1973- first mobile
phone was released
Martin Cooper
made the first call
Developed by
Motorola company
10. 1981-The IBM Personal Computer
The introduction of
the IBM Personal
Computer a quarter-
century ago set a
worldwide personal
computing standard
and helped to
establish a
multibillion-dollar
industry.
11. CD-ROM (Compact Disc Read-Only Memory)
an optical disc
format created
by Sony and
Philips and
introduced in
1985
12. 1985-87- Era of Educational
Computer Games
The mid-‘80s ushered in an
era of educational
computer games. Mavis
Beacon taught typing—
fast. Carmen Sandiego
tried to pique kids’
interest in geography. And
Number Munchers aimed
to get children excited
about multiplication and
division.