CVT

CVT may refer to:

Science and technology

ANSI escape code

In computing, ANSI escape codes (or escape sequences) are a method using in-band signaling to control the formatting, color, and other output options on video text terminals. To encode this formatting information, certain sequences of bytes are embedded into the text, which the terminal looks for and interprets as commands, not as character codes.

ANSI codes were introduced in the 1970s and became widespread in the minicomputer/mainframe market by the early 1980s. They were used by the nascent bulletin board system market to offer improved displays compared to earlier systems lacking cursor movement, leading to even more widespread use.

Although hardware text terminals have become increasingly rare in the 21st century, the relevance of the ANSI standard persists because most terminal emulators interpret at least some of the ANSI escape sequences in the output text. One notable exception is the win32 console component of Microsoft Windows.

History

Almost all manufacturers of video terminals added vendor-specific escape sequences to perform operations such as placing the cursor at arbitrary positions on the screen. One example is the VT52 terminal, which allowed the cursor to be placed at an x,y location on the screen by sending the ESC character, a y character, and then two characters representing with numerical values equal to the x,y location plus 32 (thus starting at the ASCII space character and avoiding the control characters).

USS Lexington (CV-16)

USS Lexington (CV/CVA/CVS/CVT/AVT-16), nicknamed "The Blue Ghost", is an Essex-class aircraft carrier built during World War II for the United States Navy. Originally intended to be named Cabot, word arrived during construction that the USS Lexington (CV-2) had been lost in the Battle of the Coral Sea. She was renamed while under construction to commemorate the earlier ship. She was the fifth US Navy ship to bear the name in honor of the Revolutionary War Battle of Lexington.

Lexington was commissioned in February 1943 and saw extensive service through the Pacific War. For much of her service, she acted as the flagship for Admiral Marc Mitscher, and led the Fast Carrier Task Force through their battles across the Pacific. She was the recipient of 11 battle stars and the Presidential Unit Citation. Following the war, Lexington was decommissioned, but was modernized and reactivated in the early 1950s, being reclassified as an attack carrier (CVA). Later, she was reclassified as an anti-submarine carrier (CVS). In her second career, she operated both in the Atlantic/Mediterranean and the Pacific, but spent most of her time, nearly 30 years, on the east coast as a training carrier (CVT).