The brain of computer system :
An indicator for differentiating between features for new Intel processors within a processor family. Processor numbers capture the innovative features of Intel's processors including architecture, front side bus, cache and other Intel technologies as well as clock speed. A higher number within a processor family can indicate more processor features, more of a specific processor feature, or a change in architecture.  

Brands System :
1: Intel® Pentium® and Celeron® processor numbers
Intel® Pentium® processor Extreme Edition
Intel® Pentium® D processor
Intel® Pentium® 4 processor
Intel® Pentium® M processor
Mobile Intel® Pentium® 4 processor - M
Intel® Celeron® D processor
Intel® Celeron® M processor

For the most of general User

2: Intel® Core™ processor numbers
Intel® Core™ Duo processor
Intel® Core™ Solo processor

The newer technology for fashion user

3: Intel® Xeon® processor numbers

Intel® Xeon® processor

That is Design for business user ,the most of using on server

Architecture        
The basic design of a microprocessor. It may include process technology and/or other architectural enhancements.    
Cache (MB/KB): A temporary storage area for frequently accessed or recently accessed data. Having certain data stored in a cache speeds up the operation of the computer. Cache size is measured in megabytes (MB) or kilobytes (KB).
Front Side Bus: The connecting path between the processor and other key components such as the memory controller hub. FSB speed is measured in GHz or MHz.
Clock Speed: Speed of the processor's internal clock, which dictates how fast the processor can process data. Clock speed is usually measured in GHz (gigahertz, or billions of pulses per second).
L2 Cache :The size of 2nd level cache. L2 Cache is ultra-fast memory that buffers information being transferred between the processor and the system RAM in order to streamline these transfers.         
           
Wireless :The ability to connect digital devices, to local or wide area networks (LAN/WAN), or the Internet, without the use of wires. LAN (Local Area Network): A data transmission facility connecting a number of communicating devices (computers, terminals and printers) within a single room, building, campus or other limited geographical area