APT stands for Advanced Packaging Tool, which is one of the best open-source package management tools. It needs a memory of around 512 Megabytes of RAM and is available for both 32-bit and 64-bit kernel computers. It is an efficient way of installing packages on the system. It is an evolution of the Debian software packaging system known as .deb. In order to work with the software packages of APT, apt-get command is normally used.