The range of storage technologies within a computing device. The following list starts with the slowest and ends with the fastest. Also included is the memory hierarchy. See
storage,
memory and
storage vs. memory.
**STORAGE**
Very Slow
Punch card (obsolete)
Paper tape (obsolete)
Fast
Bubble memory (obsolete)
Floppy disk (obsolete)
Much Faster
Magnetic tape
Optical disc (CD, DVD, MO, etc.)
Magnetic disk
Fastest
Flash memory (SSD, USB drive)
**MEMORY**
Main memory (DRAM)
High bandwidth memory (HBM)
Cache (SRAM)
Microcode
Register