List of abbreviations
SIMATIC IPC477E
Operating Instructions, 11/2020, A5E37455003-AF
175
Abbreviation
Term
Meaning
HD
Hard disk
Hard disk
HDA
High Definition Audio
HDD
Hard Disk Drive
Hard disk drive
HU
Height unit
HMI
Human Machine Interface
User interface
HORM
Hibernate Once - Resume Many
HT
Hyper-Threading
HTML
Hyper Text Markup Language
Script language for creating Internet pages.
HTTP
Hypertext Transfer Protocol
Protocol for data transfer on the Internet
Hardware
Hardware
I/O
Input/Output
Data input/output on computers
IAA
Intel Application Accelerator
IDE
Integrated Device Electronics
IEC
International Electronical Commission
IGD
Integrated Graphics Device
IP
Ingress Protection
Degree of protection
IR
Infrared
Infrared
IRDA
Infrared Data Association
Standard for data transfer via IR module
IRQ
Interrupt Request
Interrupt request
ISA
Industry Standard Architecture
Bus for expansion modules
ITE
Information Technology Equipment
L2C
Level 2 cache
LAN
Local Area Network
Computer network that is limited to a local area.
LCD
Liquid Crystal Display
Liquid crystal display
LED
Light Emitting Diode
Light emitting diode
LPT
Line Printer
Printer port
LVDS
Low Voltage Differential Signaling
LW
Drive
MAC
Media access control
Media access control
MC
Memory Card
Memory card in credit card format
MLFB
Machine-readable product designation
MMC
Micro Memory Card
Memory card of the format 32 mm x 24.5 mm
MPI
Multipoint-capable interface for program-
ming devices
MS-DOS
Microsoft Disc Operating System
MTBF
Mean Time Between Failures
MUI
Multilanguage User Interface
Multilanguage operating system with Windows
with language toggling; 5 languages: German,
English, French, Spanish and Italian
NA
Not Applicable
NAMUR
Normenarbeitsgemeinschaft for Mess- und
Regelungstechnik in der chemischen Indus-
trie (standardization body for instrumenta-
tion and control technology in the
chemicals industry)
