1. 1 Chapter Overview The Development of the Computer The Role of a Computer Service Professional

2. 2 The Abacus

3. 3 The Analytical Engine

4. 4 The First Electrically Driven Computer

5. 5 The Digital Electronic Computer 1939: Atanasoff-Berry Computer (ABC) 1943: Colossus I 1945: Electronic Numerical Integrator and Computer (ENIAC) 1960s–1970s: Golden era of the mainframe computer

6. 6 Milestones of Modern Computing 1971: first 4-bit multiprocessor (MP) 4004— 1 MHz 1978: first 16-bit MP 8086 and coprocessor 8087 1981: first PC by IBM (MS-DOS)—4.7 MHz 1986: first 32-bit computer—80386 1992: first Pentium—i586 1999: processor speed exceeds 1 GHz

7. 7 The Role of a Computer Service Professional Technician: troubleshoot hardware and software Scholar: continuously update skills and broaden knowledge Diplomat: cultivate good customer service skills

8. 8 Chapter Summary The abacus was the first computing device. Charles Babbage conceived the first mechanical computer. The first electrical computer computed results of the 1890 United States census. The Atanasoff-Berry Computer (1939) was the first digital computer. Today’s computer service professional must be a technician, scholar, and diplomat.