How do i find the Serial No. of my Notebook Computer?

Usually the Serial Number is written on the bottom of the case or under the battery inside a white or silver label. The Number is preceeded with the Term "Serial No." or "S/N".You can find some brand-specific Information through the links below.

IBM:
http://www-307.ibm.com/pc/support/site.wss/MIGR-49QTT6.html
ACER:
http://crm.acer.com.sg/eSupport/ereg/acer_serial_number_advice.html
GATEWAY:
http://support.gateway.com/s/MISC/CustIDSerial/Gateway_Learningsu5.shtml
SONY:
http://esupport.sony.com/EN/info/prodinfo/nb-info.html
HP:
http://h10025.www1.hp.com/ewfrf/wc/famiNumbDocument?lc=en&dlc=&cc=us&product=18703&docname=c00033108
APPLE:
http://guides.macrumors.com/Serial_Number