Developed by EmTec (Echtzeit Consulting GmbH), ZOC is a professional terminal emulator for Windows and macOS. It supports a staggering array of connection types: SSH, Telnet, Serial (RS232), Rlogin, ISDN, and Modem connections. It emulates over 20 terminal types, including VT100, VT220, TN3270 (for mainframes), TN5250 (for AS/400), and even old-school IBM 3151.