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---
categories:
- Computer Architecture
- Hardware
tags: [HDL, nand-to-tetris]
---
# Hardware Description Language
A HDL is a programming language used to describe the behaviour or structure of [digital circuits](/Electronics_and_Hardware/Digital_circuits/Integrated_circuits.md). They are used to simulate the circuit and check its response.
There are many HDLs but the most popular are VHDL ("very high speed integrated-circuit description language") and Verilog.