GB

noun

1.
a highly toxic chemical nerve agent that inhibits the activity of cholinesterase
sarin
2.
a unit of information equal to 1000 megabytes or 10^9 (1,000,000,000) bytes
G gigabyte
3.
a unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes
G GiB gibibyte gigabyte