Von Neumann vs Harvard

Von Neumann architecture - An architecture that uses a single memory and buses for both instructions and data. 

Harvard architecture - An architecture that uses a separate memory and buses for instructions and data.

Embedded system - A computer built into another device e.g. washing machine

Digital signalling processing (DSP) Systems - include audio and speech signal processing, sonar and radar signal processing, biomedical signal processing, seismic data processing and digital image processing.