How Electronic Computers Have Progressed


UNIVAC
(1951-1970)

(1968 vers.)

Kenbak 1
(1971)

IBM PC
(1981)

Macintosh
(1984)

Pentium III
Circuits Tubes,
Transistors, Integrated Circuits*

130 Integrated Circuits Intel 8088
Microchip - 29,000 Transistors

Motorola 68000 Intel P-III
Microchip - 7.5 million transistors

Generation I-II-III* III IV IV IV
RAM Memory 512 K 265 Bytes 256 K 640 K 128 Mb
Speed 1.3 MHz 1 KHz 4.77 Mhz 8 MHz 1000 MHz
Storage 100 MB Hard Drive none Floppy Drive Floppy Drives Hard Drive, Floppy, CD-Rom
Size Whole Room Briefcase
(no monitor)

Briefcase + Monitor Two shoeboxes (integrated monitor) Small Tower
Cost $1.6 million $750 $1595 ~$4000 $1500