Word:

base 64

(file format, algorithm)base 64 - A file format using 64 ASCII characters to encode the six bit binary data values 0-63.

To convert data to base 64, the first byte is placed in the most significant eight bits of a 24-bit buffer, the next in the middle eight, and the third in the least significant eight bits. If there a fewer than three bytes to encode, the corresponding buffer bits will be zero. The buffer is then used, six bits at a time, most significant first, as indices into the string "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" and the indicated character output. If there were only one or two input bytes, the output is padded with two or one "=" characters respectively. This prevents extra bits being added to the reconstructed data. The process then repeats on the remaining input data.

Base 64 is used when transmitting binary data through text-only media such as electronic mail, though uuencode is more common.
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basal placentation
Basal plane
basal rate
basal vein
Basal-nerved
Basalt
Basaltic
Basaltiform
Basaltoid
Basan
Basanite
Basbleu
Bascinet
Bascule
Bascule bridge
Base
-- base 64 --
base class
Base course
Base court
Base estate
Base fee
base hit
Base line
base memory
Base metal
base of operations
base on balls
base pair
Base plate
base price
base rate
Base ring
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