IACS is the acronym for Industrial Automation Control System. The term is in use internationally, and especially in Europe. It is a type of Operational Technology (OT) for the automation and control of industrial systems, such as those found in energy, water, transportation and manufacturing.
IACS is generally a synonym to ICS.
HMI: Human-Machine Interface
The acronym HMI stands for Human-Machine Interface which is an Operational Technology (OT). HMIs can be as simple as buttons and dials, or more complex such as touchscreen devices capable of processing.
DoS: Denial of Service
A DoS is Denial of Service which is a kind of cyber attack. See also DDoS.
DDoS: Distributed Denial of Service
DDoS is an acronym for Distributed Denial of Service, which is a type of cyber attack which aims to bring down a system or device.
DCS: Distributed Control System
DCS is an acronym for Distributed Control System and is essentially a synonym to ICS.
CNI: Critical National Infrastructure
Critical National Infrastructure (CNI), or sometimes just referred to as Critical Infrastructure, is any service which assists in the function of communities.
CNI typically includes the following industrial sectors:
Energy
Electricity, including nuclear and renewables
Oil, Gas, Coal
Water
Drinking water
Waste water
Transport
Road
Rail
Air
Water
Other sectors are sometimes included in CNI, including:
Healthcare
Financial sector
Telecommunications
Emergency services
Agriculture
Critical manufacturing, such as pharmaceuticals and chemicals
As such a critical service is critical to society by very definition, they are a target for APT groups.
CIP: Critical Infrastructure Protection
The acronym CIP is used for Critical Infrastructure Protection. It is typically for the safety and security (not just cyber) of Critical National Infrastructures (CNI).
In the United Kingdom, the physical safety and security of CNI is looked after by the CPNI. The cyber security aspects of CNI are looked after by NCSC in the UK.
CERT: Computer Emergency Response Team
CERT is an acronym for Computer Emergency Response Team. There are geographical CERTs, such as CERTs for a local or national areas. There are also subject specific CERTs, such as CERTs for ICS.