系统软件 语言与编译 释文 fast lexical analyzer generator, flex 快速词法分析器生成器
- International Federation of Sports Acrobatics
- International Federation of Sports Medicine
- International Federation of the Periodical Press
- international feed classification
- International Fencing Federation
- International Fertilizer Association
- International Film and Television Council
- international film and television education
- International Film and Television School of San Antonio de los Baños
- International Film Festival of India
- International Film Festival Rotterdam
- International Finance
- International financial reporting standards
- international fisheries documents
- international fisheries organization
- international fisheries treaties
- International Food Policy Research Institute
- International Forum on Higher Education
- International Forum on Police Education Cooperation
- International Frequency Registration Board
- International Fund for Agriculture Development
- International Fund for Agriculture Development，IFAD
- INTErnational Gamma-Ray Astrophysics Laboratory
- International Gamma-Ray Astrophysics Laboratory
- international gateway port