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Chapter 1 – Computing Fundamentals
History of Electronic Computers
First computer
– ABC (Atanasoff Berry Computer) at Iowa State U. – 1930’s
– Solved large numbers of simultaneous equations First “allpurpose” computer
– ENIAC (Electronic Numeric Integrator And Calculator)
– Main idea developed from ABC notes
Both had set wiring –data was input to memory
Lesson 1.1
John von Neumann
Mathematician
Proposed alternative to “hard wiring”
Introduced concept of stored program instructions
– Both data and instructions were stored – Led to development of multipurpose
computers
Lesson 1.1
Computer Categories
Supercomputers Mainframe computers Workstations
Personal computers (microcomputers) Laptops
More powerful than ENIAC
Palmtops Speed and size!
Lesson 1.1
Architecture
Four main parts
– CPU (central processing unit) – Main memory
– Controllers
– Peripheral devices Hardware
– Electronic and mechanical devices integrated or connected to computer
Lesson 1.2
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