bswap (3)            - reverse order of bytes
bswap_16 (3)         - reverse order of bytes
bswap_32 (3)         - reverse order of bytes
bswap_64 (3)         - reverse order of bytes
bytes (3pm)          - Perl pragma to expose the individual bytes of characters
getentropy (3)       - fill a buffer with random bytes
getrandom (2)        - obtain a series of random bytes
mblen (3)            - determine number of bytes in next multibyte character
mblen (3p)           - get number of bytes in a character
mbrlen (3)           - determine number of bytes in next multibyte character
mbrlen (3p)          - get number of bytes in a character (restartable)
memccpy (3p)         - copy bytes in memory
memcmp (3p)          - compare bytes in memory
memcpy (3p)          - copy bytes in memory
memmove (3p)         - copy bytes in memory with overlapping areas
memset (3p)          - set bytes in memory
openssl-rand (1ossl) - generate pseudo-random bytes
strdup (3p)          - duplicate a specific number of bytes from a string
strndup (3p)         - duplicate a specific number of bytes from a string
strpbrk (3)          - search a string for any of a set of bytes
swab (3)             - swap adjacent bytes
swab (3p)            - swap bytes
tpm2_getrandom (1)   - Retrieves random bytes from the TPM.
xdr_bytes (3)        - library routines for external data representation
zmq_msg_size (3)     - retrieve message content size in bytes