how to checkout previous versions

[Thirumal Raj]

hi   Can anyone tell me a solution to my queries.   1.How to checkout previous versions?I want to know abt the commands.   2.How tag is useful mainly?   thanks in advance.....   Thirumal Raj Verification and Validation Engineer Federal Technologies, KH Circle, Hosur Road, Bangalore Phone : 2275040  Ext : 282 Mobile : 98451 20460 www.Fedtec.com   "There are two kinds of people, those who do the work and those who take credit. Try to be in the first group, there is less competition there." - - Indira Gandhi