pacman --query

[Q]uery the local package database and list installed packages and versions

List only packages and versions that were [e]xplicitly installed

Find which package [o]wns a file

Display information about an [i]nstalled package

Display the [l]ist of files owned by a specific package

List orphan packages (installed as [d]ependencies but unrequired ([t]) by any package and print in [q]uiet mode (only package name is displayed))

List installed packages foreign ([m]) to the repository database

List packages that can be [u]pgraded