"register" - key terms from Wikipedia

address register
aircraft register
annual register
bank register
base register
cash register
contents of register
contents of specified base register
contents of specified index register
context register
death register
debt of honour register
des moines register
electoral register
falsetto register
federal register
flags register
g register
gross register tonnage
head register
index register
issn register
keeper of the register
listed on the national register
modal register
national register
national register of historic places
naval vessel register
p register
properties on the national register
register
register file
register indirect
register key
register machine
register of historic places
register of historic places listings
register office
register with the selective service
required to register
rule in the federal register
segment register
shift register
status register
supplementary register
tartan register
upper register
vocal fry register
vocal register
whistle register