7. Terminology

• API: Application Programming Interface - a way to interact with software from other software (rather than via a screen)
• C4 Model: an approach to software architecture diagrams devised by Simon Brown - see c4model.com
• CDN: Content Delivery Network
• CVD: colour vision deficiency
• DDD: Domain Driven Design, a technique for modelling and understanding complicated business domains based on the book by Eric Evans.
• IoT: Internet of Things
• Key/Legend: a guide to the meaning of elements in a diagram
• LAN: Local Area Network
• monochrome: a single colour
• SaaS: Software as a Service
• UML: Unified Modelling Language, a diagramming scheme popular in the 1990s and 2000s that uses predefined diagram formats for various purposes in software engineering
• UX: User Experience
• VLAN: virtualized LAN