Lenovo ThinkPad X390, Hardware Maintenance Manual, Page: 105 / 108

Appendix B. Abbreviation and acronym table
The following table lists all abbreviations and acronyms that might be used in this manual.
Abbreviation Term
3G third generation of mobile telecommunications technology
BGA Ball Grid Array
BIOS basic input/output system
CMOS
complementary metal-oxide semiconductor
COA Certificate of Authentication
CRC cyclic redundancy check
CRT cathode ray tube
CRU
customer-replaceable unit
CTO Configure To Order
EAIA Enhanced Asset Information Area
ECA Engineering Change Announcements
EEPROM Electrically Erasable Programmable Read-Only Memory
EFI Extensible Firmware Interface
EPO emergency power-off
ESD electrostatic discharge
EU European Union
FCC Federal Communications Commission
FRU Field Replaceable Unit
GAV General Announce Variant
GPU graphics processing unit
HDD hard disk drive
HDMI high-definition multimedia interface
ICs integrated circuits
ICCID
integrate circuit card identity
ISO International Standardization Organization
LAN local area network
LCD liquid crystal display
MAC
media access control
MT machine type
MTM machine type and model
PC personal computer
PCH Platform Controller Hub
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