Terminology

2225 terms, tools, patterns and metrics an architect is expected to use precisely. Each one gets a short explanation of what it is, and — where it matters — what it is commonly confused with. Search filters as you type; the column headers sort.

All areas2225 Architecture Fundamentals77 Distributed Systems107 Data Architecture110 Cloud Architecture94 Networking88 API & Integration Architecture82 Reliability & Resilience75 Observability70 Performance & Capacity Engineering72 Security Architecture86 Cost Architecture & FinOps71 Business Architecture67 Architecture Communication67 Enterprise Architecture66 Legacy Modernization71 AI-Era Architecture74 Software Architecture & Engineering71 Architecture Patterns71 Architecture Decision-Making63 The Architect's Meta-Skills61 Delivery & Release Engineering66 Platform Engineering & Developer Experience70 Testing & Quality Architecture66 Data Platform Architecture69 Streaming & Real-Time Data69 Data Governance & Semantics74 Frontend & Experience Architecture66 Edge, Mobile & IoT68 Regulatory & Data Protection Architecture65 Assurance, Audit & Model Risk69

Kind Any concept801 practice736 pattern377 metric127 case-study77 tool62 protocol45

68 terms shown.

Term	Kind	Topic	What it is
Store-and-Forward Queue On-Device Send Queue, Deferred Send Buffer	pattern	Mobile App Architecture	A durable queue on the device that accepts writes while the network is absent and drains them in order when it returns - with an explicit policy for what happens when it fills or an entry is rejected.
Sync Conflict Resolution	concept	Sync & Conflict Resolution	The policy applied when the same record was changed on two devices while they were disconnected, and both changes now arrive.
Tombstone Accumulation Metadata Growth, CRDT Garbage Problem	concept	CRDTs	The unbounded growth of deletion markers and causal metadata that a coordination-free replica must retain so a peer it has not yet seen cannot resurrect removed data.
Unreachable Node	concept	Edge, Mobile & IoT	A component you cannot log into, restart or inspect, which removes every operational technique that assumes access to the running system.
Untrusted Client Timestamp Device Time Is Not Authoritative, Client Clock Assumption	concept	Mobile App Architecture	The recognition that a timestamp set by a device is user-editable input rather than a fact - so reporting periods, ordering and de-duplication must not depend on it.
Update Long Tail Version Distribution Tail, Fleet Stratification	concept	OTA Updates	The persistent stratum of devices running old firmware because they were offline during rollouts - which grows across releases and is measured by version distribution rather than by rollout percentage.
Variant-Aware Purge Tag-Based Invalidation, Vary-Safe Purge	pattern	Edge Data Consistency	Invalidating every cached representation of a resource rather than one URL - because content negotiation and query parameters create many objects under one address, and a URL purge clears only one of them.
Zero-Touch Provisioning Zero-Touch Enrolment, Automatic Enrolment	pattern	Device Provisioning	A device obtaining its identity, configuration and assignment automatically on first connection, so that installation requires no technical procedure from the person performing it.