The Year 2000 exclusions precluded coverage for losses arising from an electronic device's inability to distinguish between century years because their programs identify years only by their last two digits and operate on the assumption that a year identified as "00" is 1900.
Insurance Services Office, Inc. (ISO), American Association of Insurance Services (AAIS), and the Surety Association of America, Inc. (SAA), developed various standard exclusion endorsements for attachment to property, liability, and fidelity insurance policies. In addition, many insurers have their own exclusions.