π (pi) is a mathematical constant whose value is the ratio of any Euclidean plane circle's circumference to its diameter; this is the same value as the ratio of a circle's area to the square of its radius. It is approximately equal to 3.14159265 in decimal notation. For Raspberry Pi, please tag with "raspberry-pi".

A QString is a class in Qt library which implements character strings.

Generally in ORM and OOP , a persistent object refers to an object that exists (or persists) in the database

Use this tag for questions about the Pulse-Code Modulation representation of sampled signals.

In physics and mathematics, the dimension of a space or object is informally defined as the minimum number of coordinates needed to specify any point within it. In the dimensional modeling, a dimension is a table in a star schema of a data warehouse. It is collection of reference information about measurable event. Dimensions categorize and describe data facts and measures in way that support meaningful answers to business questions.

Microsoft Blend for Visual Studio (formerly Microsoft Expression Blend) is a user interface design tool developed and sold by Microsoft for creating graphical interfaces for web and desktop applications that blend the features of these two types of applications.

covers open webservices and APIs provided by Yahoo!

Aerospike is an open source, distributed NoSQL database and key-value store built to achieve speed at scale out on commodity hardware. Aerospike is commonly used as a key-value store, cache replacement, user profile store, recommendation engine, and fraud detection use cases.

Notepad is a simple text editor for Microsoft Windows. Use this tag for issues relating to interfacing with Notepad and/or duplicating Notepad functionality.

For questions regarding the JavaScript `confirm` function or other such functions that ask the user for yes/no confirmation.

A look-up table is an array or matrix of data that contains items that can be searched. Lookup tables may be arranged as key-value pairs, where the keys are the data items being searched (looked up) and the values are either the actual data or pointers to where the data are located.