Netcaster - (1) A content delivery tool from Netscape.  Netscape Communicator (their web browser) users can subscribe to a content "channel" - a source of content much like a broadcast TV or radio channel - and receive content to later view offline. (2) An older definition for the act of companies broadcasting content (mostly audio and/or video) over the Internet. It's synonymous with Webcasting.   Receivers often don't need a fast Internet connection.