AL meaning in Space Science ?

Answer:

What is Air Lock mean?

Galaxy 4 (alternatively spelled Galaxy Four) is the mostly missing first serial of the third season in the British science-fiction television series Doctor Who. It was first broadcast in four weekly parts from 11 September to 2 October 1965.

In this serial, the Doctor (William Hartnell) and his travelling companions Steven (Peter Purves) and Vicki (Maureen O'Brien) arrive on an arid planet within the titular Galaxy 4, where they encounter the beautiful but dangerous Drahvins and the hideous but friendly Rills, two crash landed species in conflict with one another. Both species wish to escape as the planet is set to explode in two dawns, but the Drahvin leader Maaga (Stephanie Bidmead) only wants for her people to make it out alive.

Only the third episode ("Air Lock"), as well as a six-minute reel of the first episode ("Four Hundred Dawns") are held in the BBC Archives. The rest of the serial remains missing.

The serial is scheduled to be released in animated form on DVD and Blu-ray on 15 November 2021. The surviving episode, plus the existing six-minute segment from the first episode will be included as extras.

reference

Full Form	Category
Available Light	Academic & Science
Advaced Level	Academic & Science
Average Load	Academic & Science
Axial Load	Academic & Science
Assumed Load	Academic & Science
Associate Lecturer	Academic & Science
Active Learning	Academic & Science
Alternate Lifeform	Academic & Science
Astronomical League	Academic & Science
Aeronomy Laboratory	Academic & Science
Availability Loss	Business
Anti-Lacquer	Business
Adjustable Leg	Business
Accumulated Leaves	Business
Alcan Aluminum, LTD.	Business
Aluminium	Chemistry
Aluminum	Chemistry
Adult Literacy	Community
Anno Lucis	Community
Autumn Leaves	Community
Asynchronous Learning	Community
Ad Libitum	Community
Atomic Learning	Community
Answer List	Computer and Networking
Assembly Language	Computer Assembly Language
Advanced Level	Computing
Animated Lust	Computing
Angelic Layer	Computing
Address List	Computing
Albania	Country Names
Alaw Format Sound File	File Type
Aluminum AL	General
Amyloidosis AL	General
Antique Liquidators	General
Area Label	General
Anal Leakage	General
All Losses	General
A Lemon	General
Awesome Lens	General
an Albert	General
Aspheric Lens	General
Accelaration Lane	General
Always Late	General
Ambient Light	General
Authorization List	General
Average Legs	General
Arable Land	General
Anno Lucia	General
Adrienne Lynne	General
Auto Lite	General
Arthur Lorch	General
Alberto Lol	General
Artificial Lambaster	General
Alia Latin	General
American Lady	General
Air Liquide	General
Amyloid Light	General
and AL	General
Action Level	General
Alabama also	General
Albert	General
Aspherical Lens	General
Alabama Al	General
Also Like	General
Anon AL	General
Alvin Lambert	General
abama AL	General
Animal Life	General
Applications Lab	General
American Life	General
Approach & Landing	Governmental
Applicable Law	Governmental
Automotive Lenses	Governmental
Atlas	Governmental
At Last	Governmental
A Law	Governmental
Arab League	Governmental
Albany Field Office	Governmental
Annual Leave	Governmental
Approvable Letter	Governmental
American Law	Governmental
Arrival Locator	Governmental
ATTILI	Indian Railway Station
Active Link	Information Technology
Access List	Information Technology
Acción Laborista	International
Alianza Liberal	International
Aus Law	International
Alessandria (Province)	International
Aemter-Liste	International
Amazing Links	Internet
ArrayList	Internet
Adult Link	Internet
Agricultural Labourer	Jobs
Active Lipid	Medical
Artemether-lumefantrin	Medical
Average Lifetime	Medical
Absolute Latency	Medical
Accessory Ligament	Medical
Auris Laeva (left ear)	Medical
Acute Leukemia	Medical
Adductor Longus	Medical
ALbumin	Medical
alcoholism	Medical
Angiotropic Lymphoma	Medical
Anterior Leaflet	Medical
Anterior Lobe	Medical
anterolateral	Medical
Arterial Line	Medical
Artificial Limb	Medical
Artificial Lung	Medical
left year	Medical
After Loading	Medical
Anterior Lateral	Medical
alprazolam	Medical
Atypical Lymphocyte	Medical
Amyloid Light chain	Medical
Atherosclerotic Lesion	Medical
Auris Left (left ear)	Medical
Applications Layer	Military and Defence
Administrative Logistics	Military and Defence
Faadc2i Lightweight Computer Unit	Military and Defence
Avril Lavigne	Military and Defence
Auto Load	Military and Defence
Arbitrated Loop	Networking
Adaptation Layer	Networking
Argon Laser	Physics Related
Assisted Living	Real Estate
Almanor Railroad Company	Regional
Almanor Railroad	Regional
All Languages	Regional
Alabama	Regional
Animation Language	Softwares
Arithmetic Logic	Softwares
Air Lock	Space Science
Atlantic League	Sports
American League	Sports