EFS

EFS may refer to:

Medicine and science

 * Embryonal fyn-associated substrate, encoded by the EFS gene
 * Enhancer-FACS-seq, a medical assay
 * Estonian Physical Society (Eesti Füüsika Selts)

Technology

 * Canon EF-S lens mount
 * Emergency flotation system, installed on helicopters

Computing

 * Amazon Elastic File System, a file storage service
 * Electronic Filing System, of the Singapore Judiciary
 * Electronic Filing System (USPTO), of United States Patent and Trademark office
 * Extent File System, used in the IRIX operating system
 * Encrypting File System, the encryption subsystem of the NTFS file system

Other uses

 * Emergency Fire Service, now the South Australian Country Fire Service
 * Equal Franchise Society, a defunct American women's suffrage advocacy group
 * Estrada de Ferro Sorocabana, a Brazilian railway
 * Eternal functional subordination, a theological position
 * Exchange of futures for swaps
 * Expenditure and Food Survey, of the Office for National Statistics in Great Britain
 * GE Energy Financial Services, an American energy infrastructure investor
 * Swedish Evangelical Mission (Evangeliska fosterlandsstiftelsen)
 * Ethnological Forgery Series, a series of songs by the krautrock band Can