Double DOS

I think I remember seeing a tip about running two MS-DOS commands sequentially from a single command line prompt. I don't see a way to do this. Am I mistaken about the tip, or is it possible to stack commands?"
You can stack commands at the command prompt. To see how this works, open a command prompt window, type
chkdsk & mem
and press Enter. This runs CHKDSK and then, when CHKDSK finishes, runs MEM.