American Council of Learned Societies, a private non-profit federation of scholarly organizations
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Axcelis Technologies, engages in the design, manufacture, and servicing of capital equipment for the semiconductor manufacturing industry
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Access control list, a list of permissions attached to an object in computer security
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Advanced Cardiovascular Life Support, a set of clinical interventions for the urgent treatment of cardiac arrest and other life threatening medical emergencies
OpenVMS has a very feature-rich file system, with support for stream and record-oriented IO, ACLs, and file versioning.
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OpenVMS provides various security features and mechanisms, including security identifiers, resource identifiers, subsystem identifiers, ACLs, and detailed security auditing and alarms.
The Lifepak line of defibrillators includes both advanced units for ACLS trained personnel, as well as Automated External Defibrilators (AEDs) for use by First Responders and the general public.