A small field and its bibliographies
Egyptology covers from 5000 BCE or earlier to around 400 CE Egypt and northernmost areas of Sudan very wide range of methods: excavation, art history, history, religion, linguistics, literature … up to 500 active professionals, more or less worldwide languages: French, German, English, Italian, Spanish; many others, notably Arabic total published bibliography 100,000 or more items (since 1822); annual additions perhaps 2500 no neat definition of what should be covered bibliographies since 1886 …
Transition: hard copy to soft