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Common automation related acronyms and their meanings

Acronym Meaning Acronym Meaning
SCADA Supervisory Control & Data Acquisition PLC Programmable Logic Controller
HMI Human Machine Interface RTU Remote Terminal Unit
RIO Remote I/O RF Radio Frequency
PID Proportional Integral Derivative (feedback control) MSB Most Significant Bit
MODICON MOdular DIgital CONtoller MMI Man Machine Interface
LSB Least Significant Bit LL Ladder Logic
ISO International Standards Organization I/O Input(s) and/or Output(s)
IEEE Institute of Electrical and Electronic Engineers IEC International Electrotechnical Commission
EMI ElectroMagnetic Interference EIA Electronic Industries Association
DIO Distributed I/O CSA Canadian Standards Association
BCD Binary Coded Decimal ASCII American Standard Code for Information Interchange
KISS Keep it simple, stupid TCP/IP Transmission Control Protocol / Internet Protocol
DTE Data Terminal Equipment DCE Data Circuit-terminating Equipment
R&D Research & Development RTD Research & Technical Development
SAE System Architecture Evolution ABS Anti-Blocking System
ADSL Asymmetric Digital Subscriber Line AE Alarm and Events
SMTP Simple Mail Transfer Protocol IMAP Internet Message Access Protocol
POP Post Office Protocol MBP Modbus Plus
SI Systems Integrator BER Basic Encoding Rules
HTTP Hypertext Transfer Protocol HVAC Heat, Ventilation, Air Conditioning
DH Data Highway SPI Serial Peripheral Interface
PDU Protocol Data Unit EEPROM Electrically Erasable Programmable Read Only Memory
RAM Random Access Memory FB Field Bus
JPL Jet Propulsion Laboratory RTOS Real-Time Operating System
LAMP Stack Linux, Apache, MySQL, PHP Stack SQL Structured Query Language
LEMP Stack Linux, Nginx, MySQL, PHP Stack SSH Secure Shell