If you have purchased your copy, however, you may make a back-up for your own use in case the original is destroyed or fails to work. Some licenses may restrict the use to a specific computer. Copyright law does not permit you to run your software on two or more computers simultaneously unless the license agreement specifically allows it. It may, however, be legal to loan your software to a friend temporarily as long as you do not keep a copy, but the license must specifically state that loaning the software is acceptable. Lack of copy-protection does NOT constitute permission to copy software in order to share or sell it.
Software acquired by colleges and universities is licensed.
The licenses restrict how and where the software may be legally used by members of the community. This applies to software installed on hard disks in microcomputer clusters, software distributed on disks by a campus lending library, and software available on a campus mainframe or network. Some institutional licenses permit copying for certain purposes. Consult your campus authorities if you are unsure about the use of a particular software product. The institution may have negotiated agreements that make software available either to use or to purchase at special prices.