1. 内存：
存储器由寄存器组成。记忆是指短期数据的位置。内存中的每个寄存器都是一个存储位置。存储位置也称为内存位置。内存位置使用地址标识。内存可以存储的总位数就是它的容量。内存分为三种类型：主内存、辅助内存、高速缓存。
2. 硬盘：
硬盘是由铝制成的磁盘。它用作计算机上的主要存储设备。它使用称为盘片的金属盘。磁盘的两侧除了最上面的磁盘的上面和最下面的磁盘的下面之外，用于存储数据。磁性氧化物用于涂覆数据存储表面。
内存和硬盘的区别：
| S.No. | MEMORY | HARD DISK |
|---|---|---|
| 1 | It is an electronic component that is capable of storing data and information. | It is magnetic disk made of aluminium and used as main storage device of computer. |
| 2 | It needs a continuous power supply to hold the data. | It doesn’t need a power supply to retain the data. |
| 3 | It is temporary data storage. | It is permanent data storage. |
| 4 | It stores data at low speed. | It stores data at high speed. |
| 5 | There size are not much larger and goes upto GBs. | There size are much larger than memory and goes upto TBs. |
| 6 | It is used when data is stored for short time. | It is used when data is stored for long term. |
| 7 | It is portable easily. | It is not portable easily. |
| 8 | It stores data on a memory stick in the form of electric formats. | It stores data on a hard disk in the form of magnetic memory. |
| 9 | It is not costly as compared to hard disk. | It is costly. |
| 10 | It retrieves data at relatively low speed. | It retrieves data at high speed. |