THE FOURTH GENERATIONS OF COMPUTERS.(1972-1984)

1. Department of business administration
Dhaka international university.
Name Roll Batch
Md. Topu Kawser 28 58thB
Mariam akter chaiti 13 58thB
Md Maidul Islam Chowdhury 06 58thB
Azizul Haque Bhuiyan 07 58thB
Jerine Florence Rozario 17 58thB
Prepared by Group B

2. The time from 1972 to 1984 was consider the generation of
computers. Some of the popular inventions of the time will be presented here.

3. 1974
ALTO was designed by the
researchers at the Xerox
Palo Alto Research Center
and was considered to be
the first workstation which
had a built-in mouse used
for input .Several files were
stored simultaneously using
Alto .It had the capability of
linking to a local area
network and also had
various menu and icon
features.

4.  The original Alto's incorporated:Bit-
mapped black and white display sized
606x808 (the same dimensions as a
regular (8.5"x11") sheet of paper, aligned
vertically)
 5.8 MHz CPU
 128KB of memory (at the cost of $4000)
 2.5MB removable cartridge hard drive
 Three button mouse
 64-key keyboard and a 5-finger key set

5. 1976
Apple 1 was a single-board
computer which was designed
by Steve . The Apple 1 board
had two upper rows for a
video terminal and two lower
rows for the computer. The
6502 microprocessor in the
white package is on the lower
right.

6. Apple 1
Introduced: March 1976
Released: July 1976
Price: US $666.66 w/4K RAM
How many? about 200 total
CPU: MOS 6502, 1.0 MHz
RAM: 4K, 64K max
Display: monochrome
280 X 192, 40 X 24 text
Keyboard: not included.
Ports: composite video output
keyboard interface
one vertical expansion slot
Storage: cassette interface available
OS: firmware in ROM (HEX)
Apple BASIC on cassette

7. 1978
The VAX-11 is a
discontinued family of
minicomputers developed
and manufactured by
Digital Equipment
Corporation. It was
capable of addressing a
maximum of 4.3 gigabytes
of virtual memory which
was a hundred times more
than that of the capacity of
minicomputers.

8. VAX-11/780
Summary
Announcement date: October 1977
Codename: Star
OS support (VMS): VMS V1.5
CPU Details
CPU name (VMS): KA780
Number of processors: 1
Cache: 8KB
Compatibility mode: Yes
Console processor: LSI-11
Console device: RX01
Memory
Minimum memory: 2MB
Maximum memory: 64MB

9. 1981
IBM pc was introduced
by IBM which ignited
the personal computer
market by increasing
its growth. The first pc
used Microsoft’s MS
DOS operating system
which ran 4.77 MHz
Intel 8088
microprocessor.

10. IBM PERSONAL COMPUTER/AT
FEATURES
Also known as PC/AT
CPU Intel 8088
Memory 256 KB ~ 16 MB
Storage
20 MB hard
drive(upgrade to
30 MB hard drive),
1.2 MB HD 135
mm (5.25") floppy
Input Parallel, Seria

11. 1983
Apple introduced Lisa , the
first personal computer which
had a graphical user interface,
lisa ran on Motorola 68000
microprocessor and had a 1
megabyte RAM, dual5 ¼-inch
floppy disk drives,5- megabyte
hard drive and 12-inch black-
and-white monitor.

12. THANK YOU