What's the best RS-232 terminal?

But if you want to actually run them turned on when they are even two high, other than a VT100 (which is what I still use for the first level),

have not found another terminal (except for VT100 clones) which allows stacking.

In general, I use 6 terminals with 3 VT100s as the first level and 3 VT220s as the second level. With such old systems as the PDP-11 which don't have a Windows environment to allow more than one screen on the terminal at the same time, I find that there is an absolute need for more than one terminal at a time. In general, whenever I am doing some editing on a very long file (more than a 1000 blocks), I usually run 5 edit sessions rather than have a hard copy of the file. 4 edit sessions are for a READ ONLY copy of the assembled listing and the 5th is on the actual source code which makes the charges. One of the 4 edit sessions is almost always somewhere in the cross-reference at the end of the listing which then allows me to look at 3 of those references at the same time within the rest of the listing.