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GEORGE (autocode System)
GEORGE (General Order Generator) is a programming language invented by Charles Leonard Hamblin in 1957. It was designed around a push-down pop-up stack for arithmetic operations, and employed reverse Polish notation. The language included loops, subroutines, conditionals, vectors, and matrices. Algebraic expressions were written in reverse Polish notation; thus, a + b was written a b +, and similarly for the other arithmetic operations of subtraction, multiplication, and division. The algebraic expression ax^2 + bx + c was written a x dup × × b x × + c +, where 'dup' meant 'duplicate the value'. Following the reverse Polish form, an assignment statement to evaluate the formula y = ax^2 + bx + c was written as a x dup × × b x × + c + (y). The computer evaluated the expression as follows: the values of a, then x, were pushed onto the top of the accumulator stack; 'dup' caused a copy of the top-most value (x) to be pushed onto the top of the accumulator stack; Multiply (à ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Programming Language
A programming language is a system of notation for writing computer programs. Most programming languages are text-based formal languages, but they may also be graphical. They are a kind of computer language. The description of a programming language is usually split into the two components of syntax (form) and semantics (meaning), which are usually defined by a formal language. Some languages are defined by a specification document (for example, the C programming language is specified by an ISO Standard) while other languages (such as Perl) have a dominant implementation that is treated as a reference. Some languages have both, with the basic language defined by a standard and extensions taken from the dominant implementation being common. Programming language theory is the subfield of computer science that studies the design, implementation, analysis, characterization, and classification of programming languages. Definitions There are many considerations when defini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
