Micro Applications/macros, call them what you will.
Drag a thousand 5MB images onto one labelled Constrain 350, Make JPG 30.exe and watch imageready resize and resave them all to 300 dpi 30% compression jpegs
They are called .exe because they are cross platform I guess and you can pass them around to your pc friends.
You can make your own using photoshop actions and 'create droplet' somewhere under the file menu (near to contact sheet)
Check photoshop help for more info
Have Fun
