QT is known as cross-platform application framework. You can use this app for developing application software. You can run this application on various software and hardware platforms with little or no change in the underlying codebase, while still being a native application with native capability and speed.

Invented By: Haavard Nord and Eirik Chambe-Eng
Year Invented: 20 May 1995


QT is an app which is known as cross-platform application. This application is used by graphical user interface (GUI) framework, a toolkit. It is used for developing software that can be run on different hardware platforms and operating systems. QT is a helper to develop the software in an easy way with native-looking (to the OS it is running on) GUIs using standard C++, which is why it is also classified as a widget toolkit.

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The hard disk was invented on September 13, 1956 by IBM team led by Rey Johnson (considered as “father” of the disk drive). Earlier hard disk drives were large and cumbersome devices.