AD 54 (LIV) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Lentulus and Marcellus (or, less frequently, year 807 Ab urbe condita).

1. <computer> Atanasoff-Berry Computer. 2. <language> An imperative language and programming environment from CWI, Netherlands. It is interactive, structured, high-level, and easy to learn and use. It is a general-purpose language which you might use instead of BASIC, Pascal or AWK. It is not a systems-programming language but is good for teaching or prototyping. ABC has only five data types that can easily be combined; strong typing, yet without declarations; data limited only by memory; refinements to support top-down programming; nesting by indentation. Programs are typically around a quarter the size of the equivalent Pascal or C program, and more readable. ABC includes a programming environment with syntax-directed editing, suggestions, persistent variables and multiple workspaces and infinite precision arithmetic. An example function words to collect the set of all words in a document: HOW TO RETURN words document: PUT {} IN collection FOR line in document: FOR word IN split line: IF word not.in collection: INSERT word IN collection RETURN collection Interpreter/compiler, version 1.04.01, by Leo Geurts, Lambert Meertens, Steven Pemberton <Steven.Pemberton@cwi.nl>. ABC has been ported to Unix, MS-DOS, Atari, Macintosh. http://cwi.nl/cwi/projects/abc.html. abc">FTP eu.net (ftp://ftp.eu.net/programming/languages/abc), abc">FTP nluug.nl (ftp://ftp.nluug.nl/programming/languages/abc), abc">FTP uunet (ftp://ftp.uu.net/languages/abc). Mailing list: <abc-list-request@cwi.nl>. E-mail: <abc@cwi.nl>. ["The ABC Programmer's Handbook" by Leo Geurts, Lambert Meertens and Steven Pemberton, published by Prentice-Hall (ISBN 0-13-000027-2)]. ["An Alternative Simple Language and Environment for PCs" by Steven Pemberton, IEEE Software, Vol. 4, No. 1, January 1987, pp. 56-64.] (1995-02-09) 2. <language> Argument, Basic value, C?. An abstract machine for implementation of {functional languages} and its intermediate code. [P. Koopman, "Functional Programs as Executable Specifications", 1990]. (1995-02-09)