Alcon, (NYSE: http://www.nyse.com/about/listed/lcddata.html?ticker=ACL ACL) headquartered in Hünenberg, Switzerland, is a global medical company specializing in eye care products. Alcon's U.S. headquarters is located in Fort Worth, Texas.

Alcon, or RSY (which is more or less as commonly used of a name as Alcon), is a computer virus that was discovered to be spreading in Europe in 1997. It is a boot virus.