See software piracy.
Also see"Is Software Ownership the Same as Licensing?" in the in the "Did You Know..." section of Webopedia.

Is Open Source the Answer to Software Piracy?
Ever since the dawn of commercial software, piracy has been a problem without a realistic solution that meets the needs of both the software vendor and the end user.

Microsoft Looks to Curb Piracy in Vista Update
Microsoft Corp said on Monday it would disable the two primary methods used by software pirates to illegally copy Windows Vista software in the next major update of the operating system.

Piracy's Other Price: Jobs
The impact of software piracy and the illegal copying and distribution of other copyrighted works is hard to measure.

Webopedia's "Did You Know...?" Section
Use this Webopedia knowledge section for an in-depth overview of specific technologies and occurrences in the areas of Computer Science, The Internet, and Computer Hardware and Software.

Webopedia's Software Category
The Webopedia Software Category offers hundreds of term definitions and links related to the topic of Software.