intersystem

/ˌɪntərˈsɪstəm/
adjective
  1. Occurring between or involving two or more systems (e.g., computer systems, organizational systems).
    • The engineers designed an intersystem interface that connects the railway and bus networks.
    • Intersystem communication is essential for the smart home devices to work together.
    • The company developed an intersystem protocol to allow data sharing between its databases.
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