The Core Computer Components & Historical Development of Computer

The Historical Development of Computers:
- Babbage’s Analytical Engine – 1820s – 1870s
   - Punched card program
   - Lady Ada Byron, the first programmer
- Herman Hollerith
   - Hollerith code
   - Punched card tabulating machines – 1890 census
- ENIAC during WWII used vacuum tubes
- 1960s introduced transistor to replace tubes
- 1970s – introduction of the microprocessor
- 1974 – Altair 8800 – the first PC
- 1976 – Wosniak and Jobs – Apple I
- 1977 – Apple II
   - Plastic case
   - Keyboard
   - Capable of color graphics
- 1981 – IBM PC (introduction of MS-DOS)
- 1984 – Apple Macintosh
   - Graphical User interface (GUI) pioneered a Xerox PARC


The Core Computer Components:
- Input device(s)
- Output device(s)
- Primary storage
- Secondary storage
- Central processing unit (CPU)
- Busses