re: Quotes Added: Gov related entity hacked reporter's Sharyl Atkinson laptop

Bengal covers it pretty well but I'll expand a little on it.

Commercial probably means created by a governmental contractor and then sold to a governmental entity.

Proprietary means the governmental entity owns the rights to said program. It was most likely created to meet a specific set of criteria.

Nonattributable means the program most likely is not directly traceable to an organization. Deniable assets are all the rage in intelligence communities.

None of this is particularly out there in the realm of possibilities.