ZTerm is a shareware terminal emulator for Macintosh operating system. It was introduced in 1992 for System 7 and has been updated to run on macOS. Its name comes from its use of the ZModem file transfer protocol, which ZTerm implemented in a particularly high-performance package. In contrast to the built-in macOS Terminal app, which only communicates with other programs, ZTerm only communicates with hardware serial ports. Description When it was first introduced in 1992, ZTerm was one of the highest performing terminal emulators on the Mac, both in terms of basic text display as well as file transfer performance. ZTerm was widely regarded as the best terminal program on the Mac. Its hardware support included carrier detect (CD), hardware hangup (DTR) and hardware flow control, as well as speeds up to 119,200 bit/s on those machines that supported it. These features were not universally supported in Mac hardware, so many terminal emulators simply didn't bother to implement them at all. Even if these speeds were offered, most emulators of the era were so slow that they had trouble keeping up with faster modems, especially 9600 bit/s and faster. ZTerm supported one of the widest variety of file transfer protocols available on the Mac, including a full implementation of ZModem, YModem, YModem-G, almost all of the common varieties of XModem with different packet sizes and error correction methods, and even the rare but useful B protocol (CIS-B) for use on Compuserve. ZTerm also supported auto-starting transfers from ZModem and CIS-B, where commands from the host triggered transfers from the client. Additionally, ZTerm included a complete PC graphics character set and ANSI escape codes, including color. This made it one of the few terminals on the Mac that properly displayed ASCII art, and allowed full interaction with PC-based bulletin board systems (BBS) that used these features extensively. ZTerm added the ability to use the mouse to position the cursor, sending the correct stream of ANSI codes to move it from the current to the clicked location. Finally, ZTerm included a 10-verb built-in scripting language that allowed it to automate basic tasks. In addition to be able to run these manually, when a service was dialed using an entry in the editable Dial menu, ZTerm would look for a script with the same name and run it automatically. Versions The first public version of ZTerm was 0.9, which was released in 1992.