This document classifies the development of computer systems into three eras: the 1960s ("Day Before Yesterday"), the 1990s ("Yesterday"), and the 2000s ("Today"). It describes the main uses and operating systems of each era. In the 1960s, mainframe computers were used primarily by large organizations for tasks like data processing. Personal computers became affordable in the 1990s and were widely adopted at home, school, and small businesses. Advancements in wireless technology, e-commerce, and cloud computing defined computer usage from the 2000s onward, including the rise of smartphones. Computers now impact aspects of daily life like communication, entertainment, education, business, and security.

1. MODULE 4
USE OF COMPUTER
SYSTEMS

2. Classification
 We will classify technological advancements
as:
 Day Before Yesterday
 Yesterday
 Today

3. Day Before Yesterday [1960’s]
 Computers used primarily by corporate and
governmental organizations for critical
applications, bulk data processing enterprise
resource planning and transaction processing.
 Popular Operating Systems for Mainframes
 GM Operating System, developed in 1955
 Bell Labs produced BESYS in mid-1960
 1964 IBM announced System/360
 Unix was popular Mainframe OS

4. Typical Setup

5. Yesterday [ 1990’s]
 Advent of Microprocessors
 Introduction of Personal Computers
 Advent of Super Computers.
 Wide Usage of Computing Power in Research
, Manufacturing , Process Control etc
 Popularity of Internet

6. Usage of Computers at Home,
School or Office
 Personal Computers were affordable and were
designed for Personal or Single User
computing needs.
 PC’s were used widely At home , At Schools
and SME’s adopted PC’s for their all official
documents , reporting and data processing
needs.
 Advancement in Networking made it possible
to utilize PC’s for collaboration and Client /
Server processing

7. Typical Setup

8. Today [ 2000‘s]
 Advancement in Wireless Technology
 E-Commerce
 Virtualization
 Moving to Cloud Computing
 Popularity of Smart Phones

9. Impact of computers
1A-9
 Like the Impact of automobile

10. Computers at home
 Communication
 Entertainment
 Games
 Finances
 Education
 Business
 Security

13. Computers at School
 Admissions Management
 Accounting & Payroll Management
 Classes & Events Scheduling
 Course Delivery - Wireless / CB / e-labs
 Parent – Teacher Interaction
 Live Updates Parents and Student on
 Biometric Attendance
 Online / Offline Exam Results
 Any Event Notification
 Assignments