Embarcadero Delphi is an integrated development environment for console, desktop graphical, web, and mobile applications. wikipedia.org

Application software is a set of one or more programs designed to carry out operations for a specific application. Application software cannot run on itself but it is dependent on system software to execute. wikipedia.org

Reverse engineering is the process of discovering the technological principles of a device, object, or system through analysis of its structure, function, and operation. wikipedia.org

Debugging is a methodical process of finding and reducing the number of bugs, or defects, in a computer program or a piece of electronic hardware, thus making it behave as expected. wikipedia.org

Technical support or tech support refers to a range of services by which enterprises provide assistance to users of technology products such as mobile phones, televisions, computers, software products or other electronic or mechanical goods.

Crystal Reports is a business intelligence application used to design and generate reports from a wide range of data sources. Several other applications, including Microsoft Visual Studio, at one time bundled an OEM version of Crystal Reports as a general purpose reporting tool. wikipedia.org