Sounds like it's technically possible but never really used in practice. Since daijisen has a "加速装置" sense and Marcus found some genuine usages in google books, I can't imagine that anyone will impugn us for keeping the "pedal" meaning as a third sense with a [rare] tag.

Google N-gram Corpus Counts
╭─ーーーーーーーー─┬────────┬───────╮
│ アクセラレータ　 │ 32,209 │ 80.8% │
│ アクセラレーター │  6,766 │ 17.0% │
│ アクセレレーター │    324 │  0.8% │
│ アクセレレータ　 │    178 │  0.4% │ - add, sk
│ アクセルレーター │    340 │  0.9% │ - add, sk
│ アクセルレータ　 │     68 │  0.2% │
╰─ーーーーーーーー─┴────────┴───────╯

@@ -12,0 +13,8 @@
+</r_ele>
+<r_ele>
+<reb>アクセレレータ</reb>
+<re_inf>&sk;</re_inf>
+</r_ele>
+<r_ele>
+<reb>アクセルレーター</reb>
+<re_inf>&sk;</re_inf>
@@ -30,0 +39 @@
+<xref type="see" seq="1015290">アクセル</xref>

I would argue that koj and gakkoku say it's from アクセレーター (I included the others not as support for the change, just to give a fair summary). That plus the inclusion in Luminous plus the evidence of usage seems enough to include it. I'm sure we could find much more (old) usage on lab.ndl if we wanted too. I think it's fine.

The meaning of the first sense wasn't clear to me. Judging by the kokugos I think it's referring to things like graphics or cryptographic accelerators.
https://en.wikipedia.org/wiki/Hardware_acceleration
https://en.wikipedia.org/wiki/Cryptographic_accelerator

Daijirin displays "アクセレレーター," so probably better to make that [rk] rather than [sk].

@@ -12 +12 @@
-<re_inf>&sk;</re_inf>
+<re_inf>&rk;</re_inf>
@@ -21 +21 @@
-<gloss>accelerator</gloss>
+<gloss>accelerator (hardware)</gloss>

アクセルを踏ん	        41,016		
アクセラレーターをを踏ん	0		
アクセラレータをを踏ん	0	
アクセルペダル	        35,938		
アクセラレーターペダル	0		
アクセラレータペダル	0
アクセレレーターペダル	0		
アクセレレータペダル	0

The kokugos only tell us that アクセル is a shortening of アクセラレーター/accelerator. None of them have an accelerator pedal sense for アクセレレーター.
Looking at the n-grams, I don't think we need an accelerator pedal sense. To say it's "rare" is an understatement.

koj アクセル
(アクセレレーター（accelerator）

daijr says its 〔アクセレレーター-ペダル（accelerator pedal）の略〕

daijs says 《acceleratorの略》

nikk (英accelerator から)

gakkoku 「アクセラレーター(accelerator)」の略

mk accelerator から。

google books 
1914: ...アクセレレーター」に依て「クラッチ」「ペタル」を放し、
1920: used as rubi for 加速踏板 in ビウィク自動車操縦法
1949: アクセルレーターを踏み
1950: アクセレレーターをふみこんで速度をあげてゆくが
1972: アクセルレーター(加速機,自動車の部品,ふつうアクセルと略される)
1979 ギアをトップに切替え、アクセレレーターを踏みこんでいった。

1988
アクセルレーターを、フロアいっぱいに踏みこみつつ

@@ -27,0 +28,6 @@
+</sense>
+<sense>
+<pos>&n;</pos>
+<misc>&rare;</misc>
+<gloss>accelerator pedal</gloss>
+<gloss>gas pedal</gloss>

gg5, daij, koj

None of my refs have a "trucking" sense.
Not a computing term. Used in various contexts.

@@ -9,6 +9 @@
-<gloss>trucking</gloss>
-</sense>
-<sense>
-<pos>&n;</pos>
-<field>&comp;</field>
-<gloss>tracking (e.g. in computer graphic)</gloss>
+<gloss>tracking</gloss>

@@ -11,0 +12 @@
+<xref type="see" seq="2858510">追跡ステーション</xref>

Added additional dotted reading(s) via batch update.Added additional dotted reading(s) via batch update.
-*- via bulkupd.py -*-

@@ -6,0 +6,3 @@
+</r_ele>
+<r_ele>
+<reb>トラッキング・ステーション</reb>

バージョンアップ	1,648,550	98.0%	
ヴァージョンアップ	33,052	        2.0%

Probably better as two senses.
I think we can hide ヴァージョンアップ.

@@ -8,3 +7,0 @@
-<reb>ヴァージョンアップ</reb>
-</r_ele>
-<r_ele>
@@ -13,0 +11,4 @@
+<reb>ヴァージョンアップ</reb>
+<re_inf>&sk;</re_inf>
+</r_ele>
+<r_ele>
@@ -14,0 +16 @@
+<re_inf>&sk;</re_inf>
@@ -19,0 +22 @@
+<field>&comp;</field>
@@ -21,3 +24,9 @@
-<gloss>updating a software version</gloss>
-<gloss>version upgrade</gloss>
-<gloss>upgrading</gloss>
+<gloss>(software) update</gloss>
+<gloss>upgrade (to a new version)</gloss>
+</sense>
+<sense>
+<pos>&n;</pos>
+<pos>&vs;</pos>
+<pos>&vt;</pos>
+<gloss>upgrade (to a device, product, etc.)</gloss>
+<gloss>improvement</gloss>

Bulk addition of vi and vt from Meikyo
-*- via bulkupd.py -*-

@@ -18,0 +19 @@
+<pos>&vt;</pos>

Can be used much more generally as well
http://www.asahi.com/articles/photo/AS20170217004928.html
"由力をバージョンアップさせると妊力になります"

@@ -19 +18,0 @@
-<misc>&abbr;</misc>
@@ -22,0 +22 @@
+<gloss>upgrading</gloss>

@@ -11,0 +12 @@
+<xref type="see" seq="2858506">値渡し</xref>
@@ -13,0 +15 @@
+<gloss>pass by reference</gloss>

英和コンピューター用語辞典
値渡し	5986
参照渡し	9452

Not needed.

@@ -13 +13 @@
-<gloss>call by reference (computer)</gloss>
+<gloss>call by reference</gloss>

JEs all have "afterimage".
after image 36061
afterimage 158496

Not sure it's needed. Harmless, I guess.

It's common to use the term as both words so this update is just to make finding the definition and word easier.

@@ -17,0 +18 @@
+<gloss>after image</gloss>

gg5, daij

I don't think "imprint" is ever used with this meaning. The JEs don't have it.

@@ -15,0 +16 @@
+<field>&psych;</field>
@@ -17 +17,0 @@
-<gloss>imprint</gloss>

@@ -16,1 +16,2 @@
-<gloss>afterimage, imprint</gloss>
+<gloss>afterimage</gloss>
+<gloss>imprint</gloss>

No sign of it being used.

G n-grams: No matches

Not in my refs.

KOD

@@ -12 +12,2 @@
-<gloss>negative logic (electronics)</gloss>
+<field>&electr;</field>
+<gloss>negative logic</gloss>

Entry created

Looks fine.

jitsuyo: 自分にとって居心地が悪い場所や場違いな雰囲気を指して、俗に用いられる表現。特に、話し相手になる人がいない場合や、周りの人が全員自分の敵である場合などに用いられることが多い。
http://zokugo-dict.com/01a/away.htm
俗語的には「場違いなこと」という意味で使われる。
アウェイな感じ	1,200		
アウェイの感じ	31	
アウェイな場所	299		
アウェイの場所	70

My attempt.

@@ -25,4 +25,6 @@
-<pos>&adj-no;</pos>
-<gloss>away (from one's normal environment)</gloss>
-<gloss>external</gloss>
-<gloss>outside</gloss>
+<pos>&n;</pos>
+<pos>&adj-na;</pos>
+<misc>&col;</misc>
+<gloss>unfamiliar surroundings</gloss>
+<gloss>feeling out of place</gloss>
+<gloss>enemy territory</gloss>

アウェーの洗礼	3158	  
アウェーの雰囲気	1217	  
アウェーの環境	324	  
アウェーの空気	659

I think it's worth highlighting as a non-sports sense.

@@ -22,0 +23,6 @@
+</sense>
+<sense>
+<pos>&adj-no;</pos>
+<gloss>away (from one's normal environment)</gloss>
+<gloss>external</gloss>
+<gloss>outside</gloss>

Google アウェーな環境

Closing now.

Aligning.

@@ -13,2 +13,4 @@
-<xref type="see" seq="2640010">腹の虫が鳴る・はらのむしがなる</xref>
-<gloss>(for one's stomach) to rumble</gloss>
+<xref type="see" seq="2640010">腹の虫が鳴る</xref>
+<misc>&id;</misc>
+<gloss>one's stomach rumbles</gloss>
+<gloss>one's stomach growls</gloss>

OK

better?

@@ -14,2 +14 @@
-<gloss>stomach rumbling</gloss>
-<gloss>one's stomach is rumbling</gloss>
+<gloss>(for one's stomach) to rumble</gloss>

@@ -12,0 +12,2 @@
+<pos>&v5k;</pos>
+<xref type="see" seq="2640010">腹の虫が鳴る・はらのむしがなる</xref>

GG5

GG5 has examples with both:
腹の虫が鳴いて...
腹の虫が鳴って...
I'll add the other too.

アプセトネデブ gets far more web hits.

@@ -5 +5 @@
-<reb>あぷせとねでぶ</reb>
+<reb>アプセトネデブ</reb>
@@ -8 +8,2 @@
-<reb>アプセトネデブ</reb>
+<reb>あぷせとねでぶ</reb>
+<re_inf>&sk;</re_inf>

Can make it "unclassified" rather than "noun".
Marginal and getting very dated as the old OSI model fades into the history of networking, but I think there are enough contemporary WWW pages mentioning it to make it worth keeping.

@@ -11 +11 @@
-<pos>&n;</pos>
+<pos>&unc;</pos>

I don't think it can be both a mnemonic and a noun unless it also refers to the OSI model itself. I'm not seeing any evidence that it does.
Also, a mnemonic would need to be glossed something like this. I don't think it should be an entry.

@@ -14 +14 @@
-<gloss>OSI 7-layer model mnemonic (application, presentation, session, transport, network, data-link, physical)</gloss>
+<gloss>A-P-S-T-N-D-P (mnemonic for the OSI 7-layer model; application, presentation, session, transport, network, data-link, physical)</gloss>

アプセトネデブ	150
あぷせとねでぶ	225

I hadn't considered it a mnemonic, but it probably is. I'd call it a noun and I think it should be included.

@@ -3,0 +4,3 @@
+<r_ele>
+<reb>あぷせとねでぶ</reb>
+</r_ele>
@@ -8,0 +12 @@
+<xref type="see" seq="2288200">ＯＳＩ</xref>
@@ -10 +14 @@
-<gloss>(acronym for) OSI 7-layer model (application, presentation, session, transport, network, data-link, physical)</gloss>
+<gloss>OSI 7-layer model mnemonic (application, presentation, session, transport, network, data-link, physical)</gloss>

https://e-words.jp/w/アプセトネデブ.html
資格試験のための暗記などで用いられる。
https://ja.wikipedia.org/wiki/OSI参照モデル
OSIモデルを”あぷせとねでぶ”と頭文字を取って学習することがある。

Is this really a noun or is it just a mnemonic? If it's the latter, I'm not sure it's needed as an entry.

I think this is OK.

アイソクロナス	1049
アイソクロナス転送	664 <- https://e-words.jp/w/アイソクロナス転送.html
アイソクロナス伝送	34 <- 英和コンピューター用語辞典

Or could just include アイソクロナス転送, which is the most common use. A bit dated now.

https://e-words.jp/w/アクセラレーション.html
Unidic
アクセラレーション	8432

Seems to be used mainly/only in computing contexts.

I think this is a better example.

@@ -9 +9 @@
-<gloss>tracker (device, function, etc.)</gloss>
+<gloss>tracker (device, software, etc.)</gloss>

RP, Jitsuyo
トラッカー 48946

daijr: 集合。凝集。集成体。
https://e-words.jp/w/アグリゲーション.html

Not just computing. I think it's OK without a field tag.

@@ -9 +8,0 @@
-<field>&comp;</field>

Unidic
アグリゲーション	5642
アグリゲート	5107 <- current entry
https://www.rstone-jp.com/column/109761/  (discussion of use)

Often used for website and service aggregation.

英和コンピューター用語辞典
https://gimo.jp/glossary/details/call_by_value.html  https://kotobank.jp/word/値渡し-383
値渡し	5986
参照渡し	9452

I think this is sufficient.

@@ -13,2 +13 @@
-<gloss>updater</gloss>
-<gloss>update software</gloss>
+<gloss>updater (program)</gloss>

アップデーター	8614	8.1%
アップデータ	98172	91.9%
KOD, 英和コンピューター用語辞典

https://ja.wikipedia.org/wiki/ハードウェアアクセラレーション
https://learn.microsoft.com/ja-jp/troubleshoot/developer/browsers/core-features/gpu-hardware-acceleration
https://www.autodesk.co.jp/support/technical/article/caas/sfdcarticles/sfdcarticles/JPN/How-to-enable-or-disable-hardware-acceleration-in-AutoCAD.html

jwiki, RP, eij
G n-grams: 885

gg5, RP, eij

daijr
G n-grams: 33,326

We tend not to include one-off given names.

@@ -5 +5 @@
-<keb>麻莉愛</keb>
+<keb>今村麻莉愛</keb>
@@ -8 +8 @@
-<reb>まりあ</reb>
+<reb>いまむらまりあ</reb>
@@ -11,2 +11,2 @@
-<misc>&fem;</misc>
-<gloss>Maria</gloss>
+<misc>&person;</misc>
+<gloss>Imamura Maria (2003.9.14-; Japanese idol)</gloss>

Just 今村麻莉愛.

http://stage48.net/wiki/index.php/Imamura_Maria

https://www.akamai.com/ja
アカマイ	9082

アクロバットリーダー	68023
アクロバット・リーダー	4208
英和コンピューター用語辞典