Lenovo ThinkPad E550 (English) Hardware Maintenance Manual - ThinkPad E550, E5 - Page 110
Unified Extensible Firmware Interface, Serial Advanced Technology Attachment
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Abbreviation RF RFID RI RJ SATA SIM SVP TFTs UEFI USB UUID VGA VRAM WAN Term radio frequency radio-frequency identification ring indicator registered jack Serial Advanced Technology Attachment subscriber identity module supervisor password thin-film transistors Unified Extensible Firmware Interface Universal Serial Bus universally unique identifier video graphics array video random-access memory wide area network 104 Hardware Maintenance Manual
![](/manual_guide/products/lenovo-thinkpad-e550-english-hardware-maintenance-manual-thinkpad-e550-e555-e550c-b7fb5a6/110.png)
Abbreviation
Term
RF
radio frequency
RFID
radio-frequency identification
RI
ring indicator
RJ
registered jack
SATA
Serial Advanced Technology Attachment
SIM
subscriber identity module
SVP
supervisor password
TFTs
thin-film transistors
UEFI
Unified Extensible Firmware Interface
USB
Universal Serial Bus
UUID
universally unique identifier
VGA
video graphics array
VRAM
video random-access memory
WAN
wide area network
104
Hardware Maintenance Manual