hi all,
     I am santhosh new joinee to this site.

according to my knowledge 
salary consists of HRA, DA, PF, ESI ( if GFR < 10,000/-), 
prof. Dev., LTA & etc., which are paid to onroll employees 
on monthly basis.
Wage - may paid on hourly/daily/weekly/monthly basis which 
also consists of the piece rate system/ work assigned ( 
unskilled/skilled labour) and also for those who are on 
contract basis. they donot contain any HRA, LTA and so on.,

regards,
santhosh.p