Back in the day we use to design website with resolution:
1024px(width) by 768px(height)
but to avoid getting scrollbar from appearing from both sides we use a slightly smaller resolution, may be:
1000px(width) by 620px(height)---rectify me if I'm wrong on this one
but my main concern is how did 960 grid system comes to place? I know it is good for laying out contents accordingly within the 960px grid, but if so why not just use 1000px instead? Since it is mostly use size during that time?