Types of Computer Memory Computer memory is mainly classified into Primary Memory and Secondary Memory. 1. Primary Memory (Volatile Memory) RAM (Random Access Memory) – Temporary memory used for active processes. SRAM (Static RAM) – Faster, used in cache memory. DRAM (Dynamic RAM) – Slower but cheaper, used as main RAM. ROM (Read-Only Memory) – Permanent memory that stores firmware. PROM (Programmable ROM) – Can be programmed once. EPROM (Erasable PROM) – Can be erased using UV light. EEPROM (Electrically Erasable PROM) – Can be erased and reprogrammed electrically. 2. Secondary Memory (Non-Volatile Memory) Used for long-term data storage. HDD (Hard Disk Drive) – Magnetic storage with moving parts. SSD (Solid State Drive) – Faster storage using flash memory. Flash Memory – USB drives, memory cards. Optical Discs – CD, DVD, Blu-ray. 3. Cache Memory High-speed memory between CPU and RAM. Stores frequently accessed data for quick retrieval. 4. Virtual Memory Part of the hard drive used as RAM when needed. Helps in multitasking but is slower than RAM. 5. Register Memory Smallest and fastest memory inside the CPU. Used for immediate calculations and instructions.