A backstaff is a an early navigational instrument for measuring the altitude of the sun and hence calculating latitude.
yes it is still used today
the tank is still used today. For example the M1 Abrams is still used
long houses are not still used today
yes its still used today
yes it is still being used today.......depends where your at.
Yes teepees are still used today by uncommon are unknown idians.
Yes, trains are still being used today in large quantities.
Yes it is still used today
Their laws are still used today.
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yes it is still used today... its used in buisness buildings, hotels and various other places.