Appearance
DEC VT52
Historical Terminal
Reference entry — no automated probe data
DEC's pre-ANSI terminal. Proprietary escape sequences predating ECMA-48. DEC, 1975.
Historical Terminal · 1975 · Digital Equipment Corporation (DEC)
The DEC VT52, released in 1975, was Digital Equipment Corporation's first video terminal with cursor addressing — a breakthrough that replaced hardcopy printing terminals with screen-based interaction. Designed by DEC's terminal engineering group in Maynard, Massachusetts, it sold for approximately $1,200 and became widely used in universities, labs, and offices running DEC's PDP and VAX systems.
The VT52 used a proprietary escape sequence language predating the ECMA-48 (ANSI) standard. Cursor movement used ESC A/B/C/D (up/down/right/left), direct addressing used ESC Y followed by row and column bytes, and the screen could be cleared with ESC H ESC J. This language was simpler than ANSI sequences but fundamentally incompatible — no CSI introducer, no parameters, no semicolons.
The VT52's 80-column, 24-line display established the screen geometry the VT100 would later standardize for decades. Many terminal emulators still include a VT52 compatibility mode (xterm's DECANM toggle), and its escape codes surface in legacy systems, CP/M software, and early Unix ports. The VT52 was the stepping stone: its commercial success convinced DEC to invest in the VT100, which adopted the new ANSI standard and changed computing forever.
Significance: First DEC video terminal with cursor addressing
Analysis2026-03-26
DEC VT52 (1975) was manufactured by Digital Equipment Corporation (DEC). First DEC video terminal with cursor addressing. This is a historical reference entry — no automated probe data is available for this terminal.