ECMA International is a nonprofit standards organization for information and communication systems.

JavaScript introduce 1996
ECMA Script: when JavaScript introduce into the ECMA International Company then It’s called by ECMA + Script and introduce by 1997

Version of ECMA Script :

• ECMA-262 5.1 edition, June 2011.
• ECMA-262, 6th edition, June 2015.
• ECMA-262, 7th edition, June 2016.
• ECMA-262, 8th edition, June 2017.
• ECMA-262, 9th edition, June 2018.
• ECMA-262, 10th edition, June 2019.
• ECMA-262, 11th edition, June 2020.