Computer software
The individual or institution that purchases a program...
Can
Make an archival copy
Make adaptations to make it work properly
Add features so long as it is not sold or given without permission
Make copy in the process of authorized repair
Cannot
Load a program on more than one machine (see license)
Assume if you buy, you own (usually leased)
Assume shareware is not copyrighted
Read the software license. Each is different.