These are some common terms we use in Legato.

Term (aka)	Definition
adef	application definition file used to define the external interfaces and internal content of apps that can be built, installed, and run on target devices
AirVantage	Sierra Wireless cloud
Application (app)	a collection of one or more processes running one or more executables
Application core	application processor, usually embedded inside the same chip set as a cellular modem
API	Application Programming Interface - set of routines, protocols, and tools for building software applications
.api	API file extension
AT	see Open At
Beidou	Chinese GNSS
BSP	Board Support Package
Build Environment	Legato's application framework
Build Tools	pre-built scripts, executuables, etc to build Legato
C language	the C programming language
Runtime Library	Legato C Runtime Library
cdef	Component definition file used to define the external interfaces and internal content of reusable software components
CDC	Communication Device Class specification
CDMA	Code Division Multiple Access - channel access method used by radio communication technologies
CID	Packet Data Protocol (PDP) Context Identifier
CLIP/CLIR	Calling Line Identification Presentation/Restriction
Component	collection of code and other files that are functionally related for reuse and sharing
Config Tree	device configuration database
Definition Files (def files)	define system, application, and component files used as input to build tools
Device (target)	modem, GPS, dev kit or any other hardware
Dev Kit Board	Sierra Wireless' developer hardware
Developer Studio	Sierra Wireless Windows-based IDE
DTMF	dual-tone multi-frequency signaling
event-driven	programming where flow is determined by events like sensor outputs
ECM	Ethernet Control Modem (subclass of CDC)
Firmware (fw)	permanent software programmed into read-only memory
Framework (a-f)	software framework used to implement a standardized code structure
Galileo	European Union's GNSS
Gateway	a node (router) on a TCP/IP network that serves as an access point to another network
Git	distributed revision control and source code management system
GitHub	web-based hosting service for Git repositories
GLONASS	Russian GNSS
GNSS	Global Navigation Satellite System, generic name for systems like GPS
GPIO	General Purpose Input/Output, a generic pin on a chip
GPRS	General packet radio service, a packet oriented mobile data service
GPS	Global Positioning System, satellite navigation system
Host	omputer that hosts Legato development: the dev host
IDE	Integrated Development Environment
Interface	software to communicate between devices or programs, or computers and users
IMEI	International Mobile Equipment Identity, a number to identify 3GPP devices
IPC	inter-process communication
Kernel	Core of an operating system (hardware abstraction, security, and software abstraction)
language independent	Legato's interface definition language (IDL), similar to C
le_`*`	C runtime library source files
MAC	Media Access control - MAC address
MSD	Minimum Set of Data
Modem	Integrated telecom processor or external modem
NMEA	National Marine Electronics Association used to communicate between marine navigation and control devices
Open AT	Sierra Wireless application framework and operating system for M2M communication
PLMN	Public Land Mobile Network
Process	virutal memory address space executing one or more threads
Root File System	file system contained on the same partition on which the root directory is located
Runtime Environment	a standardized configuration for environment variables
Sandbox	security mechanism for separating running programs
sdef	system definition files are use to interconnect apps with each other and with the target's runtime environment (e.g., hardware devices)
Service	ready to use IPC APIs
Source	Sierra Wireless resource hub
Supervisor	privileged process running on the target
SSH	Secure Shell
smack	utility to spoof MAC address
stack	hardware register that holds the address of a memory location
TAIP	Trimble ASCII Interface Protocol, common for vehicle monitoring
Target (device)	an embedded wireless module
thread	thread of execution - sequence of prgrammed instructions
Tools	Target, Host, and Build tools
Toolchain	development toolset linked (or chained) together
xdef	all definition files: adef, cdef, sdef
Yocto	Yocto open source project for BSPs

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