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The lambda calculus, developed in the 1930s by Alonzo Church, is a formal system of computation built from function application. In 1937 Alan Turing proved that the lambda calculus and Turing machines are equivalent models of computation, [ 37 ] showing that the lambda calculus is Turing complete. Lambda calculus forms the basis of all ...
Technical support, also known as tech support, is a call centre type customer service provided by companies to advise and assist registered users with issues concerning their technical products. [ 1] Traditionally done on the phone, technical support can now be conducted online or through chat. At present, most large and mid-size companies have ...
This included embedding sales force automation or extended customer service (e.g. inquiry, activity management) as CRM features in their ERP. Customer relationship management was popularized in 1997 due to the work of Siebel, Gartner, and IBM. Between 1997 and 2000, leading CRM products were enriched with shipping and marketing capabilities. [15]
The simplest case of a normal distribution is known as the standard normal distribution or unit normal distribution. This is a special case when μ = 0 {\textstyle \mu =0} and σ 2 = 1 {\textstyle \sigma ^{2}=1} , and it is described by this probability density function (or density): φ ( z ) = e − z 2 / 2 2 π . {\displaystyle \varphi (z ...
Function (computer programming) In computer programming, a function, procedure, method, subroutine, routine, or subprogram is a callable unit[ 1] of software logic that has a well-defined interface and behavior and can be invoked multiple times. Callable units provide a powerful programming tool. [ 2] The primary purpose is to allow for the ...
Edward Yourdon. Edward Nash Yourdon (April 30, 1944 – January 20, 2016) was an American software engineer, computer consultant, author and lecturer, and software engineering methodology pioneer. He was one of the lead developers of the structured analysis techniques of the 1970s and a co-developer of both the Yourdon/Whitehead method for ...
The program evaluation and review technique (PERT) is a statistical tool used in project management, which was designed to analyze and represent the tasks involved in completing a given project. PERT was originally developed by Charles E. Clark for the United States Navy in 1958; it is commonly used in conjunction with the Critical Path Method ...
Iterative and incremental development. Iterative and incremental development is any combination of both iterative design (or iterative method) and incremental build model for development . Usage of the term began in software development, with a long-standing combination of the two terms iterative and incremental[ 1] having been widely suggested ...