| CLAS | Classic Bancshares, Inc. | 经典银行股份有限公司。 |
| CLAS | Community Legal Assistance Society | 社区法律援助协会 |
| CLAS | Classify | 分类 |
| CLAS | Community Lending Analysis System | 社区贷款分析系统 |
| CLAS | Common LISP Aspect System | 通用LISP方面系统 |
| CLAS | Culturally and Linguistically Appropriate Services | 文化和语言适当的服务 |
| CLAS | Color Linear Array Scanner | 彩色线性阵列扫描仪 |
| CLAS | Commonwealth Legal Advisory Service (UK) | 英联邦法律咨询服务（英国） |
| CLAS | Center for Latin American Studies | 拉丁美洲研究中心 |
| CLAS | Clayton Loan Analysis System | 克莱顿贷款分析系统 |
| CLAS | Center for Limb Atmospheric Sounding | 四肢大气探测中心 |
| CLAS | Center for Learning Arthroscopic Skills | 学习关节镜技能中心 |
| CLAS | Civil Legal Aid Scheme | 民事法律援助计划 |
| CLAS | College of Letters, Arts, and Sciences (USC) | 文学、艺术和科学学院（USC） |
| CLAS | Council of Language Arts Supervisors | 语言艺术监督委员会 |
| CLAS | Council for Leaders in Alabama Schools | 阿拉巴马州学校领袖理事会 |
| CLAS | Closed Loop Action System (Raytheon) | 闭环行动系统（雷神公司） |
| CLAS | California Learning Assessment System | 加州学习评估系统 |
| CLAS | CEBAF Large Solid Angle | CEBAF大型立体角 |
| CLAS | CESG Listed Adviser Scheme (UK) | CESG上市顾问计划（英国） |
| CLAS | Clinical Ligand Assay Society | 临床配体测定学会 |
| CLAS | Campus Learning Assistance Services | 校园学习援助服务 |
| CLAS | Criminal Litigation Accreditation Scheme (UK) | 刑事诉讼认证计划（英国） |
| CLAS | congenital localized absence of skin | 先天性局部皮肤缺失 |
| CLAS | congenital localized aplasia of the skin | 先天性局限性皮肤发育不全 |
| CLAS | clinical laboratory automation system | 临床实验室自动化系统 |
| CLAS | College of Liberal Arts and Sciences | 文理学院 |
| CLAS | Carry-Lookahead and Summation (processor unit) | 进位超前和求和（处理器单元） |
| CLAS | CEBAF Large Acceptance Spectrometer | CEBAF大型验收光谱仪 |
| CLAS | Center Level Application Software | 中心级应用软件 |
| CLAS | Clean Linear Algebra Subroutines | 干净的线性代数子例程 |
| CLAS | Conformal Load-Bearing Antenna Structure | 共形承载天线结构 |