A
ADR

Architecture Decision Record

E
ETS

Erlang Term Storage - in-memory key-value store built into the Erlang VM

G
GDPR

General Data Protection Regulation

gRPC

A high-performance, open-source universal RPC framework

M
Matrix

An open standard for decentralised, real-time communication

O
OIDC

OpenID Connect - identity layer on top of OAuth 2.0

OTP

Open Telecom Platform - Erlang/Elixir concurrency and fault-tolerance framework