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SDDL—Security Descriptor Definition Language; SDH—Synchronous Digital Hierarchy; SDI—Single-Document Interface; SEC—Single Edge Contact; SDIO—Secure Digital Input Output; SDK—Software Development Kit; SDL—Simple DirectMedia Layer; SDN—Service Delivery Network; SDP—Session Description Protocol; SDR—Software-Defined Radio
NFC devices can act as electronic identity documents and keycards. [2] They are used in contactless payment systems and allow mobile payment replacing or supplementing systems such as credit cards and electronic ticket smart cards. These are sometimes called NFC/CTLS or CTLS NFC, with contactless abbreviated as CTLS. NFC can be used to share ...
Broadly, functional requirements define what a system is supposed to do and non-functional requirements define how a system is supposed to be.Functional requirements are usually in the form of "system shall do <requirement>", an individual action or part of the system, perhaps explicitly in the sense of a mathematical function, a black box description input, output, process and control ...
In computer science, the syntax of a computer language is the rules that define the combinations of symbols that are considered to be correctly structured statements or expressions in that language. This applies both to programming languages , where the document represents source code , and to markup languages , where the document represents data.
In computer programming and software design, code refactoring is the process of restructuring existing source code—changing the factoring—without changing its external behavior. Refactoring is intended to improve the design, structure, and/or implementation of the software (its non-functional attributes), while preserving its functionality .
In computer programming, a callback is a function that is stored as data (a reference) and designed to be called by another function – often back to the original abstraction layer. A function that accepts a callback parameter may be designed to call back before returning to its caller which is known as synchronous or blocking.
In 1967, Robert W. Floyd published the paper Assigning meanings to programs; his chief aim was "a rigorous standard for proofs about computer programs, including proofs of correctness, equivalence, and termination". [2] [3] Floyd further wrote: [2] A semantic definition of a programming language, in our approach, is founded on a syntactic ...
Coding conventions simplify writing new software whose job is to process existing software. Use of static code analysis has grown consistently since the 1950s. Some of the growth of this class of development tools stems from increased maturity and sophistication of the practitioners themselves (and the modern focus on safety and security ), but ...