A sid file extension is related to the Microsoft Systems Management Server. A sid file stores software dictionary.
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.SID file extension - Systems Management Server software inventory
What is sid file? How to open sid files?
The sid file extension is associated with the Microsoft Systems Management Server (SMS) also known as System Center Configuration Manager is used for managing large groups of computers with Windows in companies and corporations.
The .sid file contains software inventory.
The default software associated to open sid file:
Microsoft Systems Management Server (SMS) 
Company or developer:
Microsoft Corporation
Systems Management Server is application used to manage large groups of Windows-based computer system. System Management Server was replaced by the System Center Configuration Manager.
List of recommended software applications associated to the .sid file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open sid file, edit sid file, convert sid file, view sid file, play sid file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with sid file - Systems Management Server software inventory
Click on the software link for more information about Microsoft Systems Management Server (SMS). Microsoft Systems Management Server (SMS) uses sid file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
