rreeggiisstteerr -- C Keyword

Storage class

rreeggiisstteerr is a C keyword that  declares a class of data storage.  A variable
so declared may be stored in  a register, which may increase the speed with
which it is read by a program.

_S_e_e _A_l_s_o
aauuttoo, CC kkeeyywwoorrddss, eexxtteerrnn, rreeggiisstteerr vvaarriiaabbllee, ssttaattiicc
ANSI Standard, section 6.5.1
