Its always great to have the best sites on knowledge together, so that it is easier to access.
Networking and related articles
Learn Networking (with diagrams)
Learn OSI, TCP/IP
Internetworking Basics
IP Address Subnetting Tutorial
Free Cisco Documentation
CCNA Tutorial
TCP/IP Networking Tutorial
Linux Networking
Networking Tutorials
Networking Resources
Internet Protocol Tutorial
ATM Internetworking (Cisco)
Tutorial for Telecommunications, Data Communications and Computer Networking
Books and Training for Internetworking and Network Security
Excellent Tutorials
W3 Schools
Servlet, JSP and JDBC
Java Server Pages (JSP) 1.0
Form Processing using Beans in JSP
Academic Tutorials
Visual Builder
Rose India
Software Engineering
Introduction to Software Engineering
SDLC Models (Overview from another site)
Software Testing
Software Project Management
Accountancy
Learn Book-Keeping
Book-Keeping Tutorial
Accounting Tutorial
Accounting and Book-Keeping Tutorial
Overview of Accountancy & Book-Keeping
Economics
Famous Sites
Wikipedia
About.com
Britannica
Encarta
Discovery
National Geographic
Animal Planet
Reference
Thesaurus
Dictionary
eHow
History Channel
Questia
Programmer's Heaven
Wikiagain!
Technology Reviews
PC World
Tech2
CNET
Techtree
Technology Review
How Stuff Works
Digital Photography Review
Imaging Resource
Manufacturers
Sony
Samsung
Lenovo
Acer
Dell
Canon
Nokia
Sony Ericsson
Motorola
The Mobile Store
HTC
HP
Physics
Physics.org
Physics.about.com
Hyperphysics
How Stuff Works
Oracle Think Quest
Physics Central
Physics World
Get all the relevant materials from Amazon -