everymonth

can someone suggest me the best mouse in the market iam into graphics designing..i have this kensington trackball wireless..but its not at all good..uses lot of power..need to change battery everymonth..not optical..so needs cleaning.. i need a normal mouse..not trackball..corded..if...

I know Microsoft publishes Windows. I don't know who are all releasing different versions of Linux. Hardly there are 7 versions of Windows ( 3.1, 3.11, 95,98, NT4, 2000, XP). Why there is more than 50 versions of linux & releasing everymonth so quickly ? Who are they behind so many...