Quickly After being introduced in August 1978, the Digital VT-100 terminal rapidly enjoyed great popularity and soon became the most widely imitated asynchronous terminal.
The VT-100 featured lots of innovations including control by an Intel 8085 microprocessor (rather than custom discrete logic), scrolling regions, different character sizes (regular, compressed, double-wide, double-high-and-wide), smooth scrolling and so on. Its control codes and escape sequences still form the basis of the xterm set and of the ANSI or IBM PC standards.
VT100 compatibility is still provided by most terminal emulators. All terminals that came after the VT100 (various VT1xx models as well as numerous competitors models) were able to emulate their ancestor, although they offered new features in addition to what the VT100 could do.
In 1982, DEC launched the VT-180. It was a VT-100 terminal with a Z80 extra board and an external floppy drive unit allowing to run CP/M OS and programs.