Web Search Overview Crawling IR Dimensions of IR Content Applications Tasks Text Web search Ad hoc search Images Vertical search Filtering Video Enterprise search Classification Scanned docs Desktop search Question answering Audio Forum search Music P2P search Literature search 11Web Search Overview & Crawling 11 Dimensions of IR Content Applications Tasks Text Web search Ad hoc search Images Vertical search Filtering Video Enterprise search Classification Scanned docs Desktop search Question answering Audio Forum search Music P2P search Literature search IR