IT Infrastructure Basics

It seems that there are many different interpretations and definitions of what IT infrastructure here are my notes from a book that seems to cover all bases.     

IT Infrastructure

Def: A set of physical devices and software applications that are required to run the starship enterprise no I mean the business enterprise.

Services that should be offered or addressed by IT Infrastructure:

Computing Platforms
Telecommuncations
Data Management
Application Software
Facilities Management
IT Management
IT Standards
IT Education  
IT Research and Development


Evolution of the IT Infrastructure Architectures:

Mainframe
Personal Computer
Client Server
Enterprise Computing
Cloud

IT Infrastructure Component:

Computer Hardware
Operating Systems
Enterprise Software
Networking \ Telecommuncations
Data Management and Storage
Internet Platforms 

Source:
Management  Information Systems
MANAGING THE DIGITAL FIRM
TWELFTH EDITION
Kenneth C. Laudon
Prentice Hall