Write-once (cache Coherency)
Write once may refer to: * Write once, run anywhere, a slogan for the cross-platform benefits of Java * Write once, compile anywhere, a slogan for the cross-platform benefits of C * Write-once (cache coherency), a write-invalidate protocol in computer memory design * Write once read many Write once read many (WORM) describes a data storage device in which information, once written, cannot be modified. This write protection affords the assurance that the data cannot be tampered with once it is written to the device, excluding the ...

Write Once, Run Anywhere
''Write once, run anywhere'' (WORA), or sometimes ''Write once, run everywhere'' (WORE), was a 1995 slogan created by Sun Microsystems to illustrate the cross-platform benefits of the Java (programming language), Java programming language. Ideally, this meant that a Java program could be developed on any device, compiled into standard bytecode, and be expected to run on any device equipped with a Java virtual machine (JVM). The installation of a JVM or Java interpreter on chips, devices, or software packages became an industry standard practice. The catch is that since there are multiple JVM implementations, on top of a wide variety of different operating systems, there could be subtle differences in how a program executes on each JVM/OS combination, possibly requiring an application to be tested on each target platform. This gave rise to a joke among Java developers: ''Write once, debug everywhere''. In comparison, the Squeak Smalltalk programming language and environment boasts o ...
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Write Once, Compile Anywhere
''Write once, compile anywhere'' (WOCA) is a philosophy taken by a compiler and its associated software libraries or by a software library/software framework which refers to a capability of writing a computer program that can be compiled on all platforms without the need to modify its source code. As opposed to Sun's ''write once, run anywhere'' slogan, cross-platform compatibility is implemented only at the source code level, rather than also at the compiled binary code level. Introduction There are many languages that aim to allow developers to follow the WOCA philosophy, such as C++, Pascal (see Free Pascal), Ada, Cobol, or C, on condition that they don't use functions beyond those provided by the standard library. Languages like Go go even further in as far that no system specific things are used, it should just work, and for system-specific elements a system of platform-specific files is used. A computer program may also use cross-platform libraries, which provide an ab ...
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Write-once (cache Coherency)
Write once may refer to: * Write once, run anywhere, a slogan for the cross-platform benefits of Java * Write once, compile anywhere, a slogan for the cross-platform benefits of C * Write-once (cache coherency), a write-invalidate protocol in computer memory design * Write once read many Write once read many (WORM) describes a data storage device in which information, once written, cannot be modified. This write protection affords the assurance that the data cannot be tampered with once it is written to the device, excluding the ...