SDA meaning in Regional ?

Answer:

What is San Diego and Arizona Railway mean?

The San Diego and Arizona Railway (reporting mark SDA) was a 148-mile (238 km) short line U.S. railroad founded by entrepreneur John D. Spreckels, and dubbed "The Impossible Railroad" by engineers of its day due to the immense logistical challenges involved. It linked San Diego, its western terminus, with El Centro, its eastern terminus, where passengers could connect with Southern Pacific's transcontinental lines, eliminating the need to first travel north via Los Angeles or Riverside.

The company charter was executed on December 14, 1906, and the groundbreaking ceremony was held the following September. Numerous delays (including government intervention during World War I) delayed the completion of the line to November 15, 1919. Damage to the lines from both natural disasters and sabotage exerted great financial pressure on the company, and in 1932 Spreckels' heirs sold their interests in the railroad to the Southern Pacific, which was named the San Diego & Arizona Eastern Railway (SD&AE).

reference

Full Form	Category
Survey Documentation and Analysis	Academic & Science
Specific Dynamic Action	Academic & Science
San Dieguito Academy	Academic & Science
Student Disability Allowance	Academic & Science
Dante Alighieri Society	Academic & Science
Società Dante Alighieri	Academic & Science
St Dominic Academy	Academic & Science
Synthesis Design Architecture	Academic & Science
Society for Design Administration	Academic & Science
Baghdad	Airport Code
South Dade Automotive, Inc.	Business
Soap and Detergent Association	Business
Simple, Direct, and Appropriate	Business
Special District Association	Business
Southwest Drycleaners Association	Business
Society of Design Administration	Business
Pre-Owned small appliances/uk	Business
Stereo Dimensional Array	Community
Software Development Asset	Community
Southland Development Authority	Community
Squash Doubles Association	Community
Senior Dining Association	Community
Space Development Agency	Community
Service Delivery Area	Community
School of Design and Arts	Community
Syracuse Development Academy	Community
Secure Digital Association	Community
Service Dogs for America	Community
Shop, Distributive and Allied Employees' Association	Community
Schools Development Authority	Community
Surface Design Association	Community
Smartphone Digital Assistant	Computer Hardware
Semi-digital Amplifier	Computer Hardware
Sgml Document Access	Computing
Software Delivery Agent	Computing
Software Design Automation	Computing
Serial Data and Address	Computing
Software Disk Array	Computing
System Display Architecture	Computing
Self Decrypting Archives	Computing
Serial Data Line	Computing
Software Distribution Network Archive	Computing
Screen Design Aid	Computing
Software Development Agreement	Computing
Security Domain Authority	Computing
Smartphone Linkage Display Audio	Computing
Software Development Academy	Computing
Software for Data Analysis	Computing
Software Defined Access	Computing
Simplified Data Access	Database Management
Software Distribution Network File Archive Description	File Type
Seventh day Adventists	General
Schwarz Differential Agar	General
Scroll Down Arrow	General
Send Data Acknowledge	General
Squik Dating Assoc	General
Some Dumb A	General
Severe Disablement Allowance	General
Self Dissolving Archive	General
Smart Driving Assist	General
Societe de Developpement Automobile	General
Societe de Distribution Automobile	General
Seventh day	General
Specially Denatured Alcohol	General
Shop Distributive and Allied	General
Standard Default Assumption	General
SCSI Disk A	General
Sex, Drugs & Alcohol	General
Syracuse Dunbar Avoca	General
Steerable Drive Axle	General
Salao Do Automovel	General
Speedway Drivers Association	General
Smartphone Link Display Audio	General
Speed Density Adaptive Control	General
Svaz Dovozcu Automobilu	General
Storia Dell'Automobile	General
Situational Driving Avoidance	General
Societe Diffusion Automobiles	General
Static Dissipative Additive	General
Summer Diesel Fuel Additive	General
Safe Distance Alert	General
Stop Distance Algorithm	General
Safety Distance Awareness	General
Solar Design Associates	General
System Dump Analyzer	General
Small Dealer's Assistance	General
Special Designated Area	General
Stranka Demokratske Akcije	General
Special Depreciation Allowance	General
Smart Digital Assistant	General
Scholarly Data Archive	General
Sectoral Decarbonization Approach	General
Satan Does All	General
Samantha Dawn Aura	General
Select Distinguished Area	General
Stan Deutsch Associates	General
Static Data Authentication	General
Serial DAta and	General
Single Daily Action	Governmental
Second Division Assistant	Governmental
Second Defense Alliance…	Governmental
Shivalik Development Agency	Haryana Government
Soin Des Arbres	International
Spontaneous Display of Affection	Internet
Severe Disability Allowance	Jobs
Same Day Appointment	Medical
Scottish Dairy Association	Medical
Specialist Disability Accommodation	Medical
Sabouraud Dextrose Agar	Medical
Standard Double Arm	Military and Defence
Seventh-day Adventist	Military and Defence
System Device Adaptor	Military and Defence
Serial Data Acquisition	Networking
Baghdad International Airport, Baghdad, Iraq	Regional
Scottish Downhill Association	Regional
Sons and Daughters of Africa	Regional
San Diego and Arizona Railway	Regional
Speed Demos Archive	Softwares
Secondary Data Access	Softwares
Space Data Association	Space Science
Shaft Drive Axis	Space Science
Source Data Automation	Space Science
Special Defense Academy	Sports