Very powerful, perhaps most powerful ever, disk utility - even tho it was written in Basic. Even more powerful today, in that emulators can load and run with high speed. You see the users manual cut into 63 or 64 jpgs, but, hint the words "Diskey Manual" underneath them all is a link to the PDF version of the whole thing.
Why bother performing disk operations on the Atari when you have a great emulator? I do all my search/compare/editing on my modern (2003) Apple Mac, and if Y'all could realize the truth about modern machines you'd Revolt. The whole industry has been lying about everything, since about year Y2K. You want voting counted by machines? You want cars driving themselves? You want drones shooting at "terrorists"?
My Mac is a 167 MHz system bus which competes with the best there is today, because chips aren't going to get faster and new machines are always robbed of more than half their performing power. I over clocked mine in every way, unlocked dual channel memory no one else knew existed, considerable OSX tinkering, I found 8 different "Taxes" had been put upon the memory bandwidth at the hardware level, eliminated all 8 of them. My machine, still with a model 2003 graphics card, draws everything on screen about 4x faster than how Apple sold it, while the rest of you think "overclocking" is good for maybe 5 to 50 percent at best. Everyone who thinks switching from RISC PowerPC to Intel x86 was a "good" thing (performance wise) is foolish. They took PPC away from you because they don't you and the rest of the public to have this much power.