An app, short for "application," is a type of software that can be installed and run on a computer, tablet, smartphone, or other mobile device. It is a self-contained software package that allows users to perform specific tasks on a mobile or desktop device. Apps are pre-installed on some devices, while others can be downloaded from app stores, which are digital distribution platforms. There are different types of apps, including web apps, native apps, hybrid apps, killer apps, and legacy apps.
Apps were originally intended for productivity assistance such as email, calendar, and contact databases, but the public demand for apps caused rapid expansion into other areas such as mobile games, factory automation, GPS and location-based services, order-tracking, and ticket purchases, so that there are now millions of apps available. When you open an application, it runs inside the operating system until you close it. Most of the time, you will have more than one application open at the same time, which is known as multi-tasking.
In summary, an app is a type of software that allows users to perform specific tasks on a mobile or desktop device. It can be downloaded from app stores or pre-installed on some devices. There are different types of apps, and they are used for various purposes.
