Talk:Portable collision avoidance system

No references to external websites have been mentioned and only the company to invent the technology has been mentioned. The term "PCAS" is growing in popularity and is used along with "TCAS" to differentiate active and passive systems to other aircraft and air traffic control. While the term "PCAS" originated with the company it is becoming a common term for a less expensive, portable TCAS-like system. TCAS is more of a commercially used term whereas PCAS is used more often in general aviation (smaller, private aircraft for example).