Like the regular pcs,laptops make use of 80286,386,486,586 processors and processors socket of different shapes and design. sockets 1,2,3,7370 are also very relevant because most old laptop use desktop processors.even since birth of pentium mmx, and celeron,AmD ,cyrix and other modern inovations.laptop make use of different processor and processsor socket. Most propulary laptop are claassified as pentium 1,11,111,4 or their equivalent because pentium is a trademark of intel incorporation .