M$ Excel++

You start typing into a cell and, if what you type matches what you have in another cell in the same column, then Excel autocompletes and you can accept if you want. Okay, thanks Bill.

Now, you type something new and, halfway through, you realize you actually want to do something else for this row - maybe copy another row, or whatever..

So, you scrap what you just typed. Aha - smell opportunity M$?

LATER, after you take care of that detour, you now start typing again, what you typed before -- are you thinking what I'm thinking M$?

Exactly! What you scrapped should not be lost, but saved in a buffer and offered up again.

Save the file and exit, then you toss it out, but not until then!!

Get there first GOOG. Please..