Look up: poc

1. POC
   acronym: particulate organic carbon
   Found on http://cdiac.ornl.gov/pns/acronyms.html#
   
   
2. POC
   Point Of Contact
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
3. PoC
   Push-to-talk over cellular. A “walkie-talkie` or PMR service for mobile phone networks. Motorola iDEN is a proprietary technology which has supported PoC capabilities for many years and PMR systems have always supported them. It is now possible to support push-to-talk using packet radio services such as GPRS & EGPRS (on GSM, EDGE and UMTS networks) and the packet services of cdmaOne and cdma2000. PoC uses VoIP (voice over IP) and SIP (Session Initiation Protocol) with mobile-specific protocols such as SigComp. The service is half duplex - only one party can speak at a time. PoC is currently being specified by 3GPP for GSM & UMTS, where it uses the IMS (IP Multimedia Subsystem) in the core network, and by OMA across all mobile networks. Packet mode makes it very economical in bandwidth terms and therefore attractive not just for vertical sector services, as for PMR, but for chat services similar to IM (instant messaging) and SMS messaging. Push-to-talk allows group calling, multiple groups at the same time, dynamic group creation by users, and fleet management. It could replace PMR, the `roger and out` radio used by public safety and vertical sector users, including recent standard s such as TETRA and TETRAPOL. Push to talk is bandwidth-efficient because it uses packet radio. This makes it cost-efficient. Push-to-talk services has potential for both horizontal markets and vertical markets - where it may compete with TETRA, GSM-R and other PMR-like technologies such as iDEN
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
4. POC
   Point Of Contact
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
5. POC
   Parents of Ostomy Children
   Found on http://www.encyclo.co.uk/local/20895
   
   
6. POC
   Point Of Contact
   Found on http://foldoc.org/POC
   
   
7. POC
   Platform Operations Costs
   Found on http://www.iodp.org/acronyms/