Which abbreviation stands for Architectural Firm?

The abbreviation that stands for Architectural Firm is AF. In professional contexts, acronyms are often used to succinctly represent longer phrases, helping to streamline communication within the industry. AF is a widely accepted abbreviation that conveys the idea of a business entity specializing in architectural services.

The other abbreviations do not correspond to Architectural Firm in the commonly accepted industry terminology. AFA could stand for other phrases related to architecture but is not standard for Architectural Firm. AFIR does not represent any recognized term pertaining to architecture. ARC, while it might be related to architecture in certain contexts, typically refers to 'architecture' itself rather than specifically denoting an architectural firm. Thus, AF is the most accurate and recognized abbreviation for Architectural Firm.