space/time

The following units of measure are used to define digital capacities and speeds. For measurements of a meter, see metric system. See binary values, NIST binary and long scale.

************************************** S P A C E ************************************** 10 to theBits or Bytes Power of: Kilo (K) Thousand 3 Mega (M) Million 6 Giga (G) Billion 9 Tera (T) Trillion 12 Bytes Peta (P) Quadrillion 15 Exa (E) Quintillion 18 Zetta (Z) Sextillion 21 Yotta (Y) Septillion 24 Bronto Octillion 27 Geop Nonillion 30 Storage Capacity Measured in: CPU word size bits Disk/SSD/USB drive bytes Memory (RAM) bytes **************************************** T I M E ***************************************Fractions of a second 10 to theSecond Power of: Millisecond (ms) Thousandth -3 Microsecond (µs) Millionth -6 Nanosecond (ns) Billionth -9 Picosecond (ps) Trillionth -12 Femtosecond (fs) Quadrillionth -15 Attosecond (as) Quintillionth -18 Zeptosecond (zs) Sextillionth -21 Yoctosecond (ys) Septillionth -24 Transmit/Transfer Measured in: Parallel bus/channel bytes/sec Parallel disk drive bytes/sec Memory (RAM) bytes/sec Cellular data plan bytes Serial bus/channel bits/sec Serial disk drive bits/sec Network & communications bits/sec Disk access time ms SSD access time µs RAM access time ns Machine cycle µs, ns Instruction execution µs, ns Transistor switching ns, ps, fs CPU Speed - Clock Cycles Per Second See Hertz. kilohertz (kHz) thousand megahertz (MHz) million gigahertz (GHz) billion terahertz (THz) trillion

space/time

The following units of measure are used to define digital capacities and speeds. For measurements of a meter, see metric system. See binary values, NIST binary and long scale.

************************************** S P A C E ************************************** 10 to theBits or Bytes Power of: Kilo (K) Thousand 3 Mega (M) Million 6 Giga (G) Billion 9 Tera (T) Trillion 12 Bytes Peta (P) Quadrillion 15 Exa (E) Quintillion 18 Zetta (Z) Sextillion 21 Yotta (Y) Septillion 24 Bronto Octillion 27 Geop Nonillion 30 Storage Capacity Measured in: CPU word size bits Disk/SSD/USB drive bytes Memory (RAM) bytes **************************************** T I M E ***************************************Fractions of a second 10 to theSecond Power of: Millisecond (ms) Thousandth -3 Microsecond (µs) Millionth -6 Nanosecond (ns) Billionth -9 Picosecond (ps) Trillionth -12 Femtosecond (fs) Quadrillionth -15 Attosecond (as) Quintillionth -18 Zeptosecond (zs) Sextillionth -21 Yoctosecond (ys) Septillionth -24 Transmit/Transfer Measured in: Parallel bus/channel bytes/sec Parallel disk drive bytes/sec Memory (RAM) bytes/sec Cellular data plan bytes Serial bus/channel bits/sec Serial disk drive bits/sec Network & communications bits/sec Disk access time ms SSD access time µs RAM access time ns Machine cycle µs, ns Instruction execution µs, ns Transistor switching ns, ps, fs CPU Speed - Clock Cycles Per Second See Hertz. kilohertz (kHz) thousand megahertz (MHz) million gigahertz (GHz) billion terahertz (THz) trillion