Table of SI Prefixes

Table of SI Prefixes

NameSymbolBase 10DecimalYear
quettaQ103010000000000000000000000000000002022
ronnaR102710000000000000000000000000002022
yottaY102410000000000000000000000001991
zettaZ102110000000000000000000001991
exaE101810000000000000000001975
petaP101510000000000000001975
teraT101210000000000001960
gigaG10910000000001960
megaM10610000001873
kilok10310001795
hectoh1021001795
decada101101795
1001
decid10−10.11795
centic10−20.011795
millim10−30.0011795
microμ10−60.0000011873
nanon10−90.0000000011960
picop10−120.0000000000011960
femtof10−150.0000000000000011964
attoa10−180.0000000000000000011964
zeptoz10−210.0000000000000000000011991
yoctoy10−240.0000000000000000000000011991
rontor10−270.0000000000000000000000000012022
quectoq10−300.0000000000000000000000000000012022
Notes: Prefixes adopted before 1960 already existed before SI. The introduction of the CGS system was in 1873.
Metric prefix. (2022, December 21). In Wikipedia. https://en.wikipedia.org/wiki/Metric_prefix

Key terms in plain language

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Broadband

A general term for always-on, high-speed Internet access. Broadband can be delivered over fiber, cable, DSL, fixed wireless, cellular, or satellite networks.

Cloud Computing

Computing resources—such as applications, servers, storage, or databases—delivered from remote infrastructure and scaled as requirements change.

Cybersecurity

The practices and controls used to protect identities, devices, networks, applications, and data from unauthorized access, disruption, or manipulation.

Identity and Access Management (IAM)

The systems and policies that determine who a user is, what resources they may access, and how that access is authenticated and reviewed.

API

An application programming interface is a defined way for software systems to exchange data or request functions from one another.

Artificial Intelligence (AI)

Software designed to perform tasks involving prediction, classification, generation, reasoning, or decision support. Business use still requires clear data, governance, security, and human accountability.