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Racket is a general-purpose, multi-paradigm programming language that serves as a modern dialect of Lisp and a descendant of Scheme. It is designed as a platform for programming language design and implementation, enabling developers to create new domain-specific and general-purpose languages. Racket's core language includes features such as macros, modules, lexical closures, tail calls, delimited continuations, parameters (fluid variables), software contracts, green threads, and OS threads. The language also comes with primitives, such as event spaces and custodians, which control resource management and enable the language to act like an operating system for loading and managing other programs. Further extensions to the language are created with the powerful macro system, which, together with the module system and custom parsers, can control all aspects of a language. Most language constructs in Racket are implemented as macros in the base language.

WnetCard Modules are the APIs basedon dynamic link libraries (DLLs) that extend the functionality of any programming language running on a Microsoft Windows platform. WnetCard Modules are based on true Windows low-level DLLs, which results in unparalleled speed of transaction execution. The procedural interface of WnetCard Modules is easy to implement and provides the fastest and most stable performance. Whether you are supporting legacy product or creating product in the newest Microsoft Visual Studio version, WnetCard Modules will provide processing functionality. The only language-specific tasks are the declarations of the routines and calls invoking the transaction routines. The DLLs will be linked at run time to any number of threads running in parallel. Thus, they render themselves naturally to multi-threaded processes that are characteristic of a server environment. This greatly simplifies the task of building a payment server if such a task is required.