The sign of an office

Quick answer：

The sign of an office typically refers to visual indicators that identify a workspace designated for administrative or professional activities. This can include a nameplate, a logo, or symbols that denote the nature of the office, such as a briefcase or a pen. In an office building, these signs help direct people to specific floors or departments. They can also be part of a larger signage system within an office space that includes directional signs, wayfinding maps, and informational displays.