1. Verilog :
Verilog 是一种硬件描述语言 (HDL)。它是一种计算机语言，用于描述电子电路的结构和行为。 1983 年，Verilog 语言在 Gateway Design Automation Inc 开始作为硬件建模的专有语言，后来在 1995 年成为 IEEE 标准 1364，并开始得到更广泛的应用。 Verilog 基于模块级测试平台。
2. SystemVerilog ：
SystemVerilog 是硬件描述语言 (HDL) 和硬件验证语言 (HVL) 的组合，并称为 HDVL。意味着它描述了电子电路的结构和行为，并验证了用硬件描述语言编写的电子电路。 SystemVerilog 作为 Verilog 的超集，在 2005 年对 Verilog 语言进行了大量扩展，成为 IEEE 标准 1800，并在 2012 年再次更新为 IEEE 1800-2012 标准。 SystemVerilog 基于本质上更具动态性的类级测试平台。
Verilog 和 SystemVerilog 的区别：
| S.No. | VERILOG | SYSTEMVERILOG |
|---|---|---|
| 01. | Verilog is a Hardware Description Language (HDL). | SystemVerilog is a combination of both Hardware Description Language (HDL) and Hardware Verification Language (HVL). |
| 02. | Verilog language is used to structure and model electronic systems. | SystemVerilog language is used to model, design, simulate, test and implement electronic system. |
| 03. | It supports structured paradigm. | It supports structured and object oriented paradigm. |
| 04. | Verilog is based on module level testbench. | SystemVerilog is based on class level testbench. |
| 05. | It is standardized as IEEE 1364. | It is standardized as IEEE 1800-2012. |
| 06. | Verilog is influenced by C language and Fortran programming language. | SystemVerilog is based on Verilog, VHDL and c++ programming language. |
| 07. | It has file extension .v or .vh | It has file extension .sv or .svh |
| 08. | It supports Wire and Reg datatype. | It supports various datatypes like enum, union, struct, string, class. |
| 09. | It is based on hierarchy of modules. | It is based on classes. |
| 10. | It was began in 1983 as proprietary language for hardware modelling. | It was originally intended as an extension to Verilog in the year 2005. |