"VT-05" can also refer to .

The VT05 was the first free-standing CRT

Cathode ray tube

The cathode ray tube is a vacuum tube containing an electron gun and a fluorescent screen used to view images. It has a means to accelerate and deflect the electron beam onto the fluorescent screen to create the images. The image may represent electrical waveforms , pictures , radar targets and...

 computer terminal

Computer terminal

A computer terminal is an electronic or electromechanical hardware device that is used for entering data into, and displaying data from, a computer or a computing system...

 from Digital Equipment Corporation

Digital Equipment Corporation

Digital Equipment Corporation was a major American company in the computer industry and a leading vendor of computer systems, software and peripherals from the 1960s to the 1990s...

. Famous for its extremely futuristic styling, the VT05 presented the user with an upper-case only 5x7 dot-matrix display of 20 rows by 72 columns

Characters per line

In typography and computing characters per line or terminal width refers to the maximal number of monospaced characters that may appear on a single line...

. The terminal only supported forward scrolling and direct cursor addressing; no fancier editing functions were supported. No special character renditions (such as blinking, bolding, underlining, or reverse video) were supported. The VT05 supported asynchronous communication

Asynchronous communication

In telecommunications, asynchronous communication is transmission of data without the use of an external clock signal, where data can be transmitted intermittently rather than in a steady stream. Any timing required to recover data from the communication symbols is encoded within the symbols...

 at baud rates up to 2400 bits per second (although fill characters were required above 300 bits per second).

Internally, the VT05 was implemented using four "quad-sized" DEC modules in a standard form-factor DEC backplane. The cards were mounted nearly-horizontally over an off-the-shelf CRT monitor. The keyboard used advanced capacitive sensors, but this proved to be unreliable and later keyboards used a simple four-contact mechanical switch.

The VT05's dynamic storage was a PMOS shift register

Shift register

In digital circuits, a shift register is a cascade of flip flops, sharing the same clock, which has the output of any one but the last flip-flop connected to the "data" input of the next one in the chain, resulting in a circuit that shifts by one position the one-dimensional "bit array" stored in...

; the delays associated with manipulating the data in the shift register resulted in the VT05 requiring fill character

Fill character

In computer terminology, a fill character is a character transmitted solely for the purpose of consuming time. It does this by filling a timeslot on a data transmission line which would otherwise be forced to be idle . In this way, fill characters provide a simple way of timing required idle...

s after each line feed (as compared to contemporaneous hard copy

Hard copy

In information handling, a hard copy is a permanent reproduction, or copy, in the form of a physical object, of any media suitable for direct use by a person , of displayed or transmitted data...

 terminals which required fill characters after each carriage return

Carriage return

Carriage return, often shortened to return, refers to a control character or mechanism used to start a new line of text.Originally, the term "carriage return" referred to a mechanism or lever on a typewriter...

).

The VT05 also had the capability of acting as a black-and-white RS-170-standard video monitor for videotape recorders, camera

Video camera

A video camera is a camera used for electronic motion picture acquisition, initially developed by the television industry but now common in other applications as well. The earliest video cameras were those of John Logie Baird, based on the electromechanical Nipkow disk and used by the BBC in...

s, and other sources. The VT05 was equipped with a video input, and could superimpose its text over the displayed video, making it suitable for interactive video systems.

The VT05 was eventually superseded by the VT50 which itself was quickly superseded by the VT52

VT52

The VT52 was a CRT-based computer terminal produced by Digital Equipment Corporation introduced in September, 1975 . It provided a screen of 24 rows and 80 columns of text and supported all 95 ASCII characters as well as 32 graphics characters. It supported asynchronous communication at baud rates...

.