Headquarters refers to the main office or center of operations for an organization, company, or military unit.
In business context, headquarters is often abbreviated as "HQ" and serves as the nerve center for decision-making and administration.
The term "headquarters" can also be used in:
1. Military - the command center for operations
2. Police - the main station
3. Non-profit organizations - the central office
4. Informal usage - someone's home or base of operations