Network Knowledge is a consortium of three Public Broadcasting Service (PBS) stations in west central Illinois. It is operated by the West Central Illinois Educational Telecommunications Corporation. The corporation previously used the brand name Convocom from 1978 until October 13, 2004.The three stations serve western Illinois (Quincy-Hannibal-Keokuk and Jacksonville-Springfield television markets, as defined by Nielsen DMA), as well as parts of Missouri and Iowa.