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RTOS

noun

RTOS is a noun meaning “Initialism of real-time operating system” (English Wiktionary, September 2026). It is spelled R-T-O-S, and it appears about once in every 13 million words in written English (wordfreq, 2021 data). The plural of RTOS is RTOSes.

What does RTOS mean?

noun

  1. 1

    Initialism of real-time operating system.

noun

as RTOs
  1. 1

    plural of RTO (a form of RTO)

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

Forms of RTOS

  • RTOSes plural
  • RT-OS

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

How common is RTOS?

RTOS appears about once in every 13 million words in written English, the 106,501st most frequent word form in the list.

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).