ATO

1. AustraliaabbreviationinitialismInitialism of Australian Taxation Office.

plural ATOs

1. abbreviationacronymcountableuncountableaeronauticsAcronym of assisted take-off.
2. abbreviationcountableinitialismuncountablerail transportInitialism of automatic train operation.

   Trains running through the Thameslink 'Core' in central London are using Automatic Train Operation (ATO) with European Train Control System (ETCS) in regular service. [...] Using ATO will enable GTR to reach the intended 24 trains per hour target between St Pancras International and Blackfriars.

   2020 January 2, “Thameslink uses ATO in 'Core'”, in Rail, page 12

3. abbreviationacronymcountableuncountablegovernmentAcronym of ammunition technical officer.
4. UkraineabbreviationacronymcountableuncountablegovernmentAcronym of anti-terrorist operation.
5. abbreviationacronymcountableuncountableaerospaceAcronym of abort to orbit.
6. abbreviationcountableinitialismuncountablecomputer securitybusinessInitialism of account take over.

   Interestingly, the nature of the available stolen data means the typical victim of an ATO attack varies slightly depending on whether a bank or a retailer is under attack.

   2022, Gilit Saporta, Shoshana Maraney, Practical Fraud Prevention, O'Reilly Media, →ISBN