64, from the Indo-Arabic numeral system invented between the 1st and 4th centuries by Indian mathematicians

‍Bit, a contraction of binary digit coined by US computer pioneer John Tukey in 1948. The opening and closing plosives suggest precision, whereas the short vowel sound suggests efficiency. 

‍64 Bits is the name we created for an exhibition of 32 websites and 32 examples of Web 1.0 computer art. See what we did there? The term 64-bits describes a generation of computers that use 64-bit microprocessors, first used in PCs in the 1990s.