# Initiator

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An **initiator** can refer to:

- A person who instigates something.
- [Modulated neutron initiator](/source/Modulated_neutron_initiator), a neutron source used in some [nuclear weapons](/source/Nuclear_weapons) - Initiator, an [Explosive booster](/source/Explosive_booster) - Initiator, the first [Nuclear chain reaction](/source/Nuclear_chain_reaction)
- [Pyrotechnic initiator](/source/Pyrotechnic_initiator), a device containing a pyrotechnic composition used primarily to ignite other, more difficult to ignite materials
- [Radical initiator](/source/Radical_initiator), chemical substances that can produce radical species under mild conditions - [Photoinitiator](/source/Photoinitiator), chemical substances that produce radical specials upon exposure to light
- [SCSI initiator](/source/SCSI_initiator), the host-side endpoint of a SCSI session
- Monomeric polyols, such as glycerin, pentaerythritol, ethylene glycol and sucrose, serving as the starting point for polymeric polyols

## Biology

- [Initiator element](/source/Initiator_element)
- [Initiator protein](/source/Initiator_protein)
- [Initiation factor](/source/Initiation_factor)

## Computers

- The [Initiator](/source/OS/360_and_successors#Reader/Initiator) of OS/360 and successors.

## See also

- [Initiation (disambiguation)](/source/Initiation_(disambiguation))
- [Initiate](/source/Initiate_(disambiguation))

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Adapted from the Wikipedia article [Initiator](https://en.wikipedia.org/wiki/Initiator) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Initiator?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.