Harvard archictecture is a type of computer archictecture.

The Harvard architecture often contrasted against von-Neumann archictecture. In the latter, code and data are both stored in the same working memory. The CPU has to fetch instructions and data by accessing the same bus leading to what is known as von-Neumann bottleneck. Of course, this doesn't really matter – virtually all modern architectures (x86-64, RiscV, ARM, Apple M1, etc.) are von-Neumann architectures.

For comparison, Harvard architecture splits data and code into two different memories. For example, data is stored on RAM or EEPROM, while code is stored on flash memory.