A "portable" application is a version of a software program that does not require installation on a computer’s hard drive. It is designed to run entirely from an external storage device, like a USB flash drive, leaving no traces on the host computer's registry.
: Another stable, free alternative for USB drives available at PortableApps.com or instructions on how to use the web apps offline Free Office 365 for Students and Educators - Microsoft microsoft office 365 portable descarga gratis