Redhat Linux - Hardware and Software Information.

[Gaurav Nigam]

Dear All, 

Can anbody please suggest/tell me the System Functions related to retrieving infomation
rgdg hardware (all the information like Monitor details, CPU speed, which cards) and 
software information (which softwares are installed). Shall be thankful if sample code
is available or any sites available from where I get the code. 

Rgds,
Gaurav.