Definition of "ATO"

ATO

proper noun
1. (Australia) Initialism of Australian Taxation Office.
noun
countable and uncountable, plural ATOs
1. (aviation) Acronym of assisted take-off.
2. (rail transport) Initialism of automatic train operation.
  Quotations
  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. (military) Acronym of ammunition technical officer.
4. (military) Acronym of anti-terrorist operation. (Ukraine)
5. (astronautics) Acronym of abort to orbit.
6. (computer security, finance) Initialism of account take over.
  Quotations
  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