All Present Said The Naked Dutch Pervert - an aide-mémoire
The International Organization for Standardization (ISO) Open Systems Interconnection model (OSI) describes the internal functions of a communication system as a set of layers.
Layer 7: Application layer
Layer 6: Presentation layer
Layer 5: Session layer
Layer 4: Transport layer
Layer 3: Network layer
Layer 2: Data link layer
Layer 1: Physical layer
At UMIST we were taught the "Bottom Up" method. So
"All Present Said The Naked Dutch Pervert"