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Qt  is a cross-platform application development framework, used for development of GUI programs, it can also be used for developing the non-GUI programs. Qt uses standard C++, but makes extensive use of the C pre-processor to enrich the language. Qt can also be used in several other programming languages through language bindings.
It runs on all major platforms, and has extensive internationalization support. Non-GUI features include SQL database access, XML parsing, thread management, network support and a unified cross-platform API for file handling.
Qt has a set of language extensions that provide a degree of flexibility at run-time that's unusual for a statically typed language like C++. Qt uses pre-processor macros and its own code-generator, moc (Meta Object Compiler), together with more conventional object-oriented techniques and patterns to implement its language extensions.
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The main objective of the project is to implement and test front end graphical user interface for the Graphical Control Module (GCM). GCM is a perimeter security system used to monitor a predefined area in order to prevent trespassing. The system helps to process the data from a number of security sensors, providing a convenient perimeter control tool.
Project Image Professional Software Associates, Inc. has performed development of several subsystems of a Computer Aided Dispatching system for freight railroads which allows planning and controlling movements of the trains. This system allows dispatchers to easily track and control the status of trains, tracks, and field units being dispatched.
Project Image The primary objective for Data Exchange Implementation project was to develop a new interface for freight railroad dispatching software which allows sending and receiving operational data from the dispatching application to an external system.
Project Image Alarm Subsystem project is a part of massive development performed by Professional Software Associates on Computer Aided Dispatching system project for freight railroads which allows planning and controlling movements of the trains.