Brief history computing

A Brief History of Computers Introduction to Computer Technology

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object]

Natural Patterns & Counting ,[object Object],[object Object],[object Object]

Magic & Counting ,[object Object],[object Object],[object Object],[object Object]

Monumental Calendars ,[object Object],[object Object],[object Object],[object Object]

Early Counting Devices ,[object Object],[object Object],[object Object]

Towards Mechanising calculations: The Abacus ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Towards Mechanising calculations: Chinese Abacus ,[object Object],[object Object]

The Hindu Zero and Place Value ,[object Object],[object Object],[object Object],[object Object]

What is a “Computer”? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Towards Mechanising calculations: Other aids to calculation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Towards computers: The First Mechanical Calculator ,[object Object],[object Object]

Towards computers: The First Mechanical Calculator ,[object Object],Blaise Pascal (1623-1662) Gottfried Wilhelm von Leibniz (1646-1716) Charles Babbage (1812-1833)

Pascal’s Arithmetic Machine ,[object Object],NOTE: In fact the Arithmetic Machine could really only add, because subtractions were performed using complement techniques, in which the number to be subtracted is first converted into its complement, which is then added to the first number. Interestingly enough, modern computers employ similar complement techniques. [Known as 2’s complement mathematics] This gear train system is still used by mechanical odometers

Leibniz’s Step Reckoner ,[object Object],Pascal's and Leibniz's devices were the forebears of today's desk-top computers, and derivations of these machines continued to be produced until their electronic equivalents finally became readily available and affordable in the early 1970s. Leibniz also strongly advocated the use of the binary number system , which is fundamental to the operation of modern computers .

Charles Babbage Difference Engine & Analytical Engine ,[object Object],[object Object],[object Object],[object Object]

Babbage’s Conditional Decisions ,[object Object],[object Object],[object Object],Augusta Ada Lovelace (Lord Byron’s daughter) worked with Babbage and created a program for the Analytical Machine. She is considered to be the first programmer

Herman Hollerith’s Tabulating Machine ,[object Object],[object Object],[object Object],[object Object],[object Object]

The Birth of IBM (International Business Machines) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Punched Cards & Tape ,[object Object],[object Object],[object Object]

The First Programmable Computer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

WWII - Reading Enemy Secrets ,[object Object],[object Object],[object Object],[object Object]

WWII - ENIAC ,[object Object],[object Object],[object Object],[object Object]

Harvard Mark I ,[object Object],[object Object],[object Object],[object Object]

Digital Computer Basics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Developing Computer Technology Crucial Inventions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Developing Computer Technology Important Ideas ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Developing Computer Technology Important Ideas ,[object Object],[object Object]

1973 AD to 1981 AD The First Personal Computers (PCs) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Email, Internet & WWW ,[object Object],[object Object],[object Object],[object Object]

CP1030 Introduction to Information Technology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Brief history computing

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Editor's Notes