# Appendix A: Glossary

The embedded ecosystem is full of different protocols, hardware components andvendor-specific things that use their own terms and abbreviations. This Glossaryattempts to list them with pointers for understanding them better.

TermMeaning
I2CSometimes referred to as I² C or Inter-IC. It is a protocol meant for hardware communication within a single integrated circuit. See i2c.info for more details
SPISerial Peripheral Interface