- asynchronous transfer mode
- asynchronous transfer mode, ATM
- asynchronous transfer mode-based passive optical network
- asynchronous transfer mode，ATM
- asynchronous transmission
- A-system
- A Systematic Analysis of the Music of Errentai
- A Systematic Analysis on the Development of Opera in Jiangsu
- A Systematic Study on the Costume of Peking Opera
- A Systematic Treatise on Qiongju Opera
- a system of memorial submission for the Grand Secretariat
- a system of ridges and furrows
- asyzygetic form
- asyzygetic invariant
- AS树脂
- AT
- At
- at
- ATA
- Ata Atadzhanov
- a table and two chairs-simplified props
- A Table under the Crescent After the Dinner
- Atacama Cosmology Telescope
- Atacama Large Millimeter/sub-millimeter Array
- Atacama lithium deposit