I apologize for the oversight. Here are some sources that provide information on computer errors and malfunctions:

    "AT&T Outage Traced to Software Error." New York Times, July 11, 1991. https://www.nytimes.com/1991/07/11/business/at-t-outage-traced-to-software-error.html.

    Leveson, Nancy G. "An Investigation of the Therac-25 Accidents." Computer, vol. 26, no. 7, July 1993, pp. 18-41. doi: 10.1109/MC.1993.274940.

While these sources may not specifically mention the 9000 series computers, they provide examples of errors and malfunctions in computer systems that are relevant to the broader topic of computer reliability and safety.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence