Similar to UTF-7

BinHex

Border Gateway Protocol

CAST-128

CAST-256

Comma-separated values

Common Management Information Protocol

Datagram Congestion Control Protocol

Deflate

Diameter (protocol)

Endpoint Handlespace Redundancy Protocol

Punycode

Base64

DMARC

Internet Message Access Protocol

JSON Meta Application Protocol

MAPI

POP before SMTP

Opportunistic TLS

Email authentication

Feedback loop (email)

Character encoding

SBCS

Double-byte character set

ANK