Evolution of Information Technologies.
                     Evolution of Information 
Technologies
INTRODUCTION
• Information technology (IT) is the use of computers to 
store, retrieve, transmit, and manipulate data or 
information. 
• IT is typically used within the context of business 
operations as opposed to personal or entertainment 
technologies.
Source: Wikipedia
1940s – 1950s: 
UNIVAC Computer
• On June 30, 1945, John Von Neumann published the First 
Draft of a Report on the EDVAC. 
• It was the first documented discussion of the stored 
program concept and the blueprint for computer 
architecture. 
Source: adataanalyst.com
Direct-access architecture
• Further, in this period, it was a direct-access architecture 
with no operating system or remote access and used for 
scientific computing. There were no software 
applications.
Source: adataanalyst.com
1960s- 1970s: 
Mainframe Computer
• In this era, it was a centralized architecture with 
operating system built-in within the hardware. 
• Computers were mostly mainframes and minicomputers. 
Remote access was available from client terminals. 
Applications and data were centralized. 
Source: adataanalyst.com
Information Technology Roles
• IT roles included performing printer backups, conducting 
system upgrades via lengthy procedures, manually 
running user batch tasks, keeping terminals stocked with 
paper and swapping out blown tubes.
Source: adataanalyst.com
1980s – 1990s: 
Personal Computer
• This decade saw the introduction of the Personal 
Computer(PC) and had Client/Server architecture with 
operating system separated from hardware. 
• Application and data were distributed with processing 
shared between clients and distributed servers. 
Source: Wikipedia
Windows operating system
• This generation of IT worked in cubicles onsite, often 
sharing space alongside the users they supported. 
• Most employees were using PCs with Windows operating 
system.
Source: Wikipedia
Web access
• Toward the end of the 1990s, Internet connectivity 
became the most requested computing resource among 
growing businesses. Employers worried about 
productivity and often limited Web access.
Source: Wikipedia
2000s – present: 
Mobile
• This era is web services architecture with the virtual 
operating system. 
• While computer networks took IT from the accounting 
department to all corners of the enterprise, the World 
Wide Web took IT to all corners of the globe, connecting 
millions of people. 
Source: Wikipedia
Cloud computing
• Mobile and cloud computing is responsible for running 
the infrastructure. 
• Cloud computing enables on-demand and convenient 
network access to a shared pool of computing devices 
that can be established quickly and released with 
minimal management effort or service provider 
interactions.
Source: Wikipedia