What are the 3 types of software?--Computers are managed by software. Software may be divided into three categories: system, utility, and application.
What is the difference between download and install?--The act of "downloading" a file is distinct from "installing" it. Instructions to utilize the downloaded data to modify your computer are "installing" the file. The file does not alter or be updated if installation is not performed.
What is software used for?--Software is a collection of instructions, data, or computer programs used to run machines and carry out certain activities. It is the antithesis of hardware which refers to a computer external components. A device running programs, scripts, and applications are collectively referred to as "software" in this context.
Ffdshow is a DirectShow decoding filter for decompressing DivX, XviD, WMV, MPEG-1, and MPEG-2 movies. It uses libav codec from ffmpeg project for video decompression, post processing code from mplayer to enhance visual quality of low bit rate movies, and is based on original DirectShow filter from XviD, which is GPL’ed educational implementation of MPEG4 encoder.