* Pakistan President Musharraf quits ahead of impeachment.
* IOC says revenue loss on auto fuel sale sharply down Aug 16-31.
* M&M to hold 51% stake in JV with China's Jiangsu Yueda Yancheng.
* NMDC signs MoU with Rio Tinto for iron ore exploration.
* NMDC to raise all iron ore contract prices Apr 1.
* Bartronics CEO says FY09 revenue guidance unchanged at 5 bln rupees.
* Lehman recommends selling Indian shrs; sees no Asia mkt bottoming.
* Telecom dept seeks bids to select agency for 3G spectrum e-auction.
* Bartronics India gets 4-bln-rupee order.
* TRAI recommends unrestricted Internet telephony service by ISPs.
* China to raise coke export tariff to 40% from 25% Wed.
* Food secretary warns of stern steps to curb sugar prices.
* Allahabad High Court annuls UP cane price for 2007-08.