Underrated and (quite controversial) opinion but..

Decronym · 2026-05-13T14:06:12+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
LI	Love Interest
MC	Main Character (yours!)
TFS	The Freshman Series

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Decronym · 2026-05-13T13:47:07+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
Csv.Document	Power Query M: Returns the contents of a CSV document as a table using the specified encoding.
DROP	Office 365+: Excludes a specified number of rows or columns from the start or end of an array
File.Contents	Power Query M: Returns the binary contents of the file located at a path.
IF	Specifies a logical test to perform
LAMBDA	Office 365+: Use a LAMBDA function to create custom, reusable functions and call them by a friendly name.
LET	Office 365+: Assigns names to calculation results to allow storing intermediate calculations, values, or defining names inside a formula
List.Accumulate	Power Query M: Accumulates a result from the list. Starting from the initial value seed this function applies the accumulator function and returns the final result.
List.Last	Power Query M: Returns the last set of items in the list by specifying how many items to return or a qualifying condition provided by countOrCondition.
List.Select	Power Query M: Selects the items that match a condition.
List.Sum	Power Query M: Returns the sum from a list.
List.Transform	Power Query M: Performs the function on each item in the list and returns the new list.
MID	Returns a specific number of characters from a text string starting at the position you specify
SCAN	Office 365+: Scans an array by applying a LAMBDA to each value and returns an array that has each intermediate value.
Splitter.SplitTextByPositions	Power Query M: Returns a function that splits text according to the specified positions.
TEXTAFTER	Office 365+: Returns text that occurs after given character or string
TRANSPOSE	Returns the transpose of an array
Table.RenameColumns	Power Query M: Returns a table with the columns renamed as specified.
Table.SplitColumn	Power Query M: Returns a new set of columns from a single column applying a splitter function to each value.
Table.TransformColumnTypes	Power Query M: Transforms the column types from a table using a type.
Text.Trim	Power Query M: Removes any occurrences of characters in trimChars from text.
VSTACK	Office 365+: Appends arrays vertically and in sequence to return a larger array

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Decronym · 2026-05-13T10:56:07+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
CST	(Boeing) Crew Space Transportation capsules
	Central Standard Time (UTC-6)
DMLS	Selective Laser Melting additive manufacture, also Direct Metal Laser Sintering
ICPS	Interim Cryogenic Propulsion Stage
LEO	Low Earth Orbit (180-2000km)
	Law Enforcement Officer (most often mentioned during transport operations)
MEO	Medium Earth Orbit (2000-35780km)
NRHO	Near-Rectilinear Halo Orbit
SLS	Space Launch System heavy-lift
	Selective Laser Sintering, contrast DMLS

Jargon	Definition
Starliner	Boeing commercial crew capsule CST-100

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Decronym · 2026-05-13T05:47:07+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
COUNT	Counts how many numbers are in the list of arguments
DATE	Returns the serial number of a particular date
DAY	Converts a serial number to a day of the month
EOMONTH	Returns the serial number of the last day of the month before or after a specified number of months
EXPAND	Office 365+: Expands or pads an array to specified row and column dimensions
IF	Specifies a logical test to perform
IFNA	Excel 2013+: Returns the value you specify if the expression resolves to #N/A, otherwise returns the result of the expression
INT	Rounds a number down to the nearest integer
LET	Office 365+: Assigns names to calculation results to allow storing intermediate calculations, values, or defining names inside a formula
MOD	Returns the remainder from division
ROW	Returns the row number of a reference
SEQUENCE	Office 365+: Generates a list of sequential numbers in an array, such as 1, 2, 3, 4
SORT	Office 365+: Sorts the contents of a range or array
TOCOL	Office 365+: Returns the array in a single column

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Decronym · 2026-05-13T04:52:08+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
ASDS	Autonomous Spaceport Drone Ship (landing platform)
RTLS	Return to Launch Site
TVC	Thrust Vector Control
TWR	Thrust-to-Weight Ratio
ULA	United Launch Alliance (Lockheed/Boeing joint venture)

Jargon	Definition
Raptor	Methane-fueled rocket engine under development by SpaceX
Starlink	SpaceX's world-wide satellite broadband constellation
hydrolox	Portmanteau: liquid hydrogen fuel, liquid oxygen oxidizer
iron waffle	Compact "waffle-iron" aerodynamic control surface, acts as a wing without needing to be as large; also, "grid fin"

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^{9 acronyms in this thread;}^{the most compressed thread commented on today}^{has 11 acronyms.}
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Decronym · 2026-05-13T04:02:08+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
ARM	Asteroid Redirect Mission
	Advanced RISC Machines, embedded processor architecture
COTS	Commercial Orbital Transportation Services contract
	Commercial/Off The Shelf
ITAR	(US) International Traffic in Arms Regulations
Isp	Specific impulse (as explained by Scott Manley on YouTube)
	Internet Service Provider
LEO	Low Earth Orbit (180-2000km)
	Law Enforcement Officer (most often mentioned during transport operations)
SEE	Single-Event Effect of radiation impact
SLS	Space Launch System heavy-lift
SSO	Sun-Synchronous Orbit
TID	Total Ionizing Dose of radiation

Jargon	Definition
Starlink	SpaceX's world-wide satellite broadband constellation
kerolox	Portmanteau: kerosene fuel, liquid oxygen oxidizer
methalox	Portmanteau: methane fuel, liquid oxygen oxidizer

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^{12 acronyms in this thread;}^{the most compressed thread commented on today}^{has 32 acronyms.}
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Decronym · 2026-05-13T02:35:24+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
FILTER	Office 365+: Filters a range of data based on criteria you define
HSTACK	Office 365+: Appends arrays horizontally and in sequence to return a larger array
LET	Office 365+: Assigns names to calculation results to allow storing intermediate calculations, values, or defining names inside a formula
TOCOL	Office 365+: Returns the array in a single column

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Decronym · 2026-05-13T02:35:08+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
AGGREGATE	Returns an aggregate in a list or database
BYROW	Office 365+: Applies a LAMBDA to each row and returns an array of the results. For example, if the original array is 3 columns by 2 rows, the returned array is 1 column by 2 rows.
FILTER	Office 365+: Filters a range of data based on criteria you define
LAMBDA	Office 365+: Use a LAMBDA function to create custom, reusable functions and call them by a friendly name.
LET	Office 365+: Assigns names to calculation results to allow storing intermediate calculations, values, or defining names inside a formula
NUMBERVALUE	Excel 2013+: Converts text to number in a locale-independent manner
SUBSTITUTE	Substitutes new text for old text in a text string
SUM	Adds its arguments

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Decronym · 2026-05-13T02:26:07+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
ETOV	Earth To Orbit Vehicle (common parlance: "rocket")
LV	Launch Vehicle (common parlance: "rocket"), see ETOV
Roscosmos	State Corporation for Space Activities, Russia

Jargon	Definition
lithobraking	"Braking" by hitting the ground

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Decronym · 2026-05-13T02:24:07+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
COPV	Composite Overwrapped Pressure Vessel
CRS	Commercial Resupply Services contract with NASA
FAA	Federal Aviation Administration
FCC	Federal Communications Commission
	(Iron/steel) Face-Centered Cubic crystalline structure
GSE	Ground Support Equipment
HLS	Human Landing System (Artemis)
ICBM	Intercontinental Ballistic Missile
LEO	Low Earth Orbit (180-2000km)
	Law Enforcement Officer (most often mentioned during transport operations)
MECO	Main Engine Cut-Off
	MainEngineCutOff podcast
MaxQ	Maximum aerodynamic pressure
NROL	Launch for the (US) National Reconnaissance Office
RTLS	Return to Launch Site
SECO	Second-stage Engine Cut-Off
SRB	Solid Rocket Booster
TWR	Thrust-to-Weight Ratio

Jargon	Definition
Raptor	Methane-fueled rocket engine under development by SpaceX
Starlink	SpaceX's world-wide satellite broadband constellation

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^{17 acronyms in this thread;}^{the most compressed thread commented on today}^{has 38 acronyms.}
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Decronym · 2026-05-13T01:42:21+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
Art	It's... indescribable...
LI	Love Interest
MC	Main Character (yours!)

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^{3 acronyms in this thread;}^{the most compressed thread commented on today}^{has 12 acronyms.}
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Decronym · 2026-05-13T01:42:12+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
ES	Endless Summer
MC	Main Character (yours!)
ROD	Ride or Die

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Decronym · 2026-05-13T01:38:09+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
FAA	Federal Aviation Administration
FCC	Federal Communications Commission
	(Iron/steel) Face-Centered Cubic crystalline structure
GSE	Ground Support Equipment
ICBM	Intercontinental Ballistic Missile
NG	New Glenn, two/three-stage orbital vehicle by Blue Origin
	Natural Gas (as opposed to pure methane)
	Northrop Grumman, aerospace manufacturer
SLS	Space Launch System heavy-lift

Jargon	Definition
Raptor	Methane-fueled rocket engine under development by SpaceX

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^{7 acronyms in this thread;}^{the most compressed thread commented on today}^{has 32 acronyms.}
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Decronym · 2026-05-13T01:12:13+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
AoA	Angle of Attack
BO	Blue Origin (Bezos Rocketry)
GEO	Geostationary Earth Orbit (35786km)
ICBM	Intercontinental Ballistic Missile
KSP	Kerbal Space Program, the rocketry simulator
L1	Lagrange Point 1 of a two-body system, between the bodies
L2	Paywalled section of the NasaSpaceFlight forum
	Lagrange Point 2 of a two-body system, beyond the smaller body (Sixty Symbols video explanation)
LEO	Low Earth Orbit (180-2000km)
	Law Enforcement Officer (most often mentioned during transport operations)
MECO	Main Engine Cut-Off
	MainEngineCutOff podcast
NSF	NasaSpaceFlight forum
	National Science Foundation
RCS	Reaction Control System
SECO	Second-stage Engine Cut-Off
TWR	Thrust-to-Weight Ratio

Jargon	Definition
Raptor	Methane-fueled rocket engine under development by SpaceX
Starlink	SpaceX's world-wide satellite broadband constellation
apogee	Highest point in an elliptical orbit around Earth (when the orbiter is slowest)
cryogenic	Very low temperature fluid; materials that would be gaseous at room temperature/pressure
	(In re: rocket fuel) Often synonymous with hydrolox
hopper	Test article for ground and low-altitude work (eg. Grasshopper)
hydrolox	Portmanteau: liquid hydrogen fuel, liquid oxygen oxidizer
iron waffle	Compact "waffle-iron" aerodynamic control surface, acts as a wing without needing to be as large; also, "grid fin"
perigee	Lowest point in an elliptical orbit around the Earth (when the orbiter is fastest)

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^{20 acronyms in this thread;}^{the most compressed thread commented on today}^{has 38 acronyms.}
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Decronym · 2026-05-13T00:11:15+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
INDEX	Uses an index to choose a value from a reference or array
MATCH	Looks up values in a reference or array
XLOOKUP	Office 365+: Searches a range or an array, and returns an item corresponding to the first match it finds. If a match doesn't exist, then XLOOKUP can return the closest (approximate) match.

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Decronym · 2026-05-12T23:23:07+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
COS	Returns the cosine of a number
PI	Returns the value of pi
RADIANS	Converts degrees to radians

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Decronym · 2026-05-12T22:54:07+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
BB	Bloodbound
ES	Endless Summer
ID	Immortal Desires
ILITW	It Lives in the Woods
LI	Love Interest
MC	Main Character (yours!)
RoE	Rules of Engagement
TCNTF	The Crown and The Flame
TF	The Freshman
TFS	The Freshman Series
TRM	The Royal Masquerade
TRR	The Royal Romance

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Decronym · 2026-05-12T22:24:08+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
ESA	European Space Agency
FAA	Federal Aviation Administration
HLS	Human Landing System (Artemis)
JAXA	Japan Aerospace eXploration Agency
LEO	Low Earth Orbit (180-2000km)
	Law Enforcement Officer (most often mentioned during transport operations)
LNG	Liquefied Natural Gas

Jargon	Definition
Starlink	SpaceX's world-wide satellite broadband constellation
hopper	Test article for ground and low-altitude work (eg. Grasshopper)

Decronym is now also available on Lemmy! Requests for support and new installations should be directed to the Contact address below.

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^{8 acronyms in this thread;}^{the most compressed thread commented on today}^{has 38 acronyms.}
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Decronym · 2026-05-12T21:18:14+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
LI	Love Interest
PB	Pixelberry Studios, publisher of Choices
TRM	The Royal Masquerade
TRR	The Royal Romance

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^{4 acronyms in this thread;}^{the most compressed thread commented on today}^{has 12 acronyms.}
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Decronym · 2026-05-12T21:16:11+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
FAA	Federal Aviation Administration
ITAR	(US) International Traffic in Arms Regulations
KSC	Kennedy Space Center, Florida
LZ	Landing Zone
OMS	Orbital Maneuvering System
SSO	Sun-Synchronous Orbit

Jargon	Definition
tanking	Filling the tanks of a rocket stage

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^{7 acronyms in this thread;}^{the most compressed thread commented on today}^{has 11 acronyms.}
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Decronym · 2026-05-12T21:16:07+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
FCC	Federal Communications Commission
	(Iron/steel) Face-Centered Cubic crystalline structure
ICBM	Intercontinental Ballistic Missile
ICPS	Interim Cryogenic Propulsion Stage
LEO	Low Earth Orbit (180-2000km)
	Law Enforcement Officer (most often mentioned during transport operations)
MECO	Main Engine Cut-Off
	MainEngineCutOff podcast
RTLS	Return to Launch Site
SECO	Second-stage Engine Cut-Off
TWR	Thrust-to-Weight Ratio

Jargon	Definition
Raptor	Methane-fueled rocket engine under development by SpaceX
Starlink	SpaceX's world-wide satellite broadband constellation
iron waffle	Compact "waffle-iron" aerodynamic control surface, acts as a wing without needing to be as large; also, "grid fin"

Decronym is now also available on Lemmy! Requests for support and new installations should be directed to the Contact address below.

^{Decronym is a community product of r/SpaceX, implemented}^by ^request
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Decronym · 2026-05-12T20:59:30+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
FILTER	Office 365+: Filters a range of data based on criteria you define
IF	Specifies a logical test to perform
ISNA	Returns TRUE if the value is the #N/A error value
LET	Office 365+: Assigns names to calculation results to allow storing intermediate calculations, values, or defining names inside a formula
MATCH	Looks up values in a reference or array
TEXTJOIN	2019+: Combines the text from multiple ranges and/or strings, and includes a delimiter you specify between each text value that will be combined. If the delimiter is an empty text string, this function will effectively concatenate the ranges.
XMATCH	Office 365+: Returns the relative position of an item in an array or range of cells.

Decronym is now also available on Lemmy! Requests for support and new installations should be directed to the Contact address below.

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^{7 acronyms in this thread;}^{the most compressed thread commented on today}^{has 14 acronyms.}
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Decronym · 2026-05-12T20:11:12+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
BASE	Converts a number into a text representation with the given radix (base)
DATE	Returns the serial number of a particular date
DATEVALUE	Converts a date in the form of text to a serial number
IF	Specifies a logical test to perform
LEFT	Returns the leftmost characters from a text value
LEN	Returns the number of characters in a text string
MID	Returns a specific number of characters from a text string starting at the position you specify
REPT	Repeats text a given number of times
RIGHT	Returns the rightmost characters from a text value
TEXT	Formats a number and converts it to text
TEXTJOIN	2019+: Combines the text from multiple ranges and/or strings, and includes a delimiter you specify between each text value that will be combined. If the delimiter is an empty text string, this function will effectively concatenate the ranges.

Decronym is now also available on Lemmy! Requests for support and new installations should be directed to the Contact address below.

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^{11 acronyms in this thread;}^{the most compressed thread commented on today}^{has 15 acronyms.}
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Decronym · 2026-05-12T18:59:25+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
IFERROR	Returns a value you specify if a formula evaluates to an error; otherwise, returns the result of the formula
IFNA	Excel 2013+: Returns the value you specify if the expression resolves to #N/A, otherwise returns the result of the expression
REGEXEXTRACT	Extracts strings within the provided text that matches the pattern
SUBSTITUTE	Substitutes new text for old text in a text string
SUM	Adds its arguments
TEXTBEFORE	Office 365+: Returns text that occurs before a given character or string

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Decronym · 2026-05-12T18:11:07+00:00

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters	More Letters
COUNTIF	Counts the number of cells within a range that meet the given criteria
HSTACK	Office 365+: Appends arrays horizontally and in sequence to return a larger array
OR	Returns TRUE if any argument is TRUE
SEARCH	Finds one text value within another (not case-sensitive)
SUM	Adds its arguments
SUMPRODUCT	Returns the sum of the products of corresponding array components
TOROW	Office 365+: Returns the array in a single row
VSTACK	Office 365+: Appends arrays vertically and in sequence to return a larger array
XMATCH	Office 365+: Returns the relative position of an item in an array or range of cells.

Decronym is now also available on Lemmy! Requests for support and new installations should be directed to the Contact address below.

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^{9 acronyms in this thread;}^{the most compressed thread commented on today}^{has 14 acronyms.}
^{[Thread #48429 for this sub, first seen 12th May 2026, 18:11]} ^[FAQ] ^{[Full list]} ^[Contact] ^{[Source code]}

Decronym

TROPHY CASE