Further cultural subdivisions according to tool types, such as Olduwan or Mousterian or Levalloisian help archaeologists and other anthropologists in understanding major trends in the human past.
Pamagian budaya salanturnyane manut jenis alat, sakadi Olduwan utawi Mousterian, utawi Levalloisian nulungin para arkeolog lan antropolog lianan ring ngeresepang tren utama ring masa purbane manusa.