There are probably thousands. Most archaeologists specialize in
one geographic area or one time period, often both! An
archaeologist may also specialize in a particular aspect such as
flora or fauna, architecture, ceramics or lithics. There is no end
to the possibilities. Some of them are listed below including some
theoretical approaches.
Archaeoastronomy, Behavioural archaeology, Biblical archaeology,
Bioarchaeolgy, Classical archaeology, Cognitive archaeology,
Commercial archaeology, Egyptian archaeology, Environmental
archaeology, Ethnoarchaeology, Evolutionary archaeology,
Experimental archaeology, Feminist archaeology, Field archaeology,
Forensic archaeology, Gender archaeology, Geoarchaeology,
Historical archaeology, Industrial archaeology, Interpretitive
archaeology, Landscape archaeology, Maritime archaeology, Marxist
archaeology, Mediaeval archaeology, Nationalist archaeology,
Nautical archaeology, Neo-Marxist archaeology, New Archaeology,
Processual archaeology, Post-Processual archaeolgy,
Osteoarchaeology, Settlement archaeology, Social archaeology,
Underwater archaeology, Urban archaeology, Zooarchaeology