1. 分析引擎：
分析引擎是一种完全控制的通用计算机，其中包括自动机械数字计算机。任何计算集都是在穿孔卡片的帮助下进行编程的。它还包括集成的内存和程序流控制以及 ALU。它是第一个通用机械计算机系统，由它进行或执行任何其他有限计算。
2. 差分引擎：
差异引擎一词源自拉丁文的除法差异。差分引擎是一种自动机械计算器，设计或开发用于计算或制表多项式函数。它可以通过使用小系数集以表格形式计算多项式函数。
差分机和分析机的区别：
| Analytical Engine | Difference Engine |
|---|---|
| It can do the 4 basic mathematical operation. | It can only do one mathematical operation. |
| It can perform addition, subtraction, multiplication, and division. | It can only perform the addition function. |
| It is a general-purpose computer system. | It is a type of simple mechanical computer. |
| It is an intendedly controlled machine. | It is created in a way to tabulate the mechanical functions. |
| It is a type of automatic mechanical digital computer. | It includes the material expression of any indefinite function. |
| It can perform any calculation sets before it. | It is performed to calculate the polynomial functions. |
| In this engine, it is not intended for tabulating the results for a particular function | It is intended to tabulate the results of a particular function. |
| It contains the memory and storage which is equal to the CPU. | It includes the other operations which are done by the addition operation. |
| The basic arithmetic operations in this are independent of each other. | It can perform various calculations that the analytical engine can not perform. |
| It is slower in speed. | It is faster in speed. |
| Analytical Engine is not been constructed because of its mechanical complexities. | Difference Engines are constructed. |
| It is very heavily detailed and technical in nature. | It is very impressive in nature. |
| It does not provide much overview of the designs general-purpose. | It helps in solving the various types of complex problems. |