Q: A "pangram" is a sentence containing all 26 letters.

 What is the shortest pangram (measured by number of letters or words)?
 What is the shortest word list using all 26 letters in alphabetical order?
 In reverse alphabetical order?

A:

Each single letter is a word denoting that letter, and in addition the following single-letter words have meanings unrelated to their letter shapes or sounds, position in the alphabet, etc.:

 a - indefinite article; on; in; at; to; he; him; she; her; they; them; it; I;
    have; of; all
 c - 100; cocaine; programming language
 d - 500
 e - base of natural logs; eccentricity; enlarging
 g - acceleration of gravity; general ability; $1000; general audience
 i - one; unit vector in x direction; personal pronoun; in; aye
 j - one; unit vector in y direction
 k - 1000; 1024; strikeout; unit vector in z direction
 l - 50; ell; elevated railroad
 m - 1000; em; pica; an antigen of human blood
 n - an indefinite number; en; an antigen of human blood
 o - oh
 q - quality of oscillatory circuit
 R - one of the three Rs; restricted audience
 t - t-shirt
 u - upper class
 v - five
 w - w particle
 x - unknown quantity; atmospherics; adults only
 y - unknown quantity; YMCA
 z - unknown quantity; buzzing sound; z particle

It is therefore advisable to exclude single-letter words, with the possible exception of 'a'.

As always, word acceptability varies with the dictionaries used. We use these:

 10C  - Merriam-Webster's Collegiate Dictionary, Tenth Edition, 1993
 NI3 - Merriam-Webster's Third New International Dictionary, 1961
 NI2 - Merriam-Webster's New International Dictionary, Second Edition, 1935
 OED - Oxford English Dictionary with Supplements, 1933 - 85
 '+' indicates obsolete, dialectical, slang, or otherwise substandard word.

Some exceptional pangrams without names or abbreviations: Using only words in 10C:

 The quick brown fox jumps over the lazy dog. (9 words, 35 letters)
 Sympathizing would fix Quaker objectives. (5 words, 36 letters)
 Quick fawns jumped over the big lazy ox. (8 words, 32 letters, Parade 6/30/02)
 Pack my box with five dozen liquor jugs. (8 words, 32 letters)
 Jackdaws love my big sphinx of quartz. (7 words, 31 letters, Marvin Moore)
 Quick waxy bugs jump the frozen veldt. (7 words, 31 letters)
 The five boxing wizards jump quickly. (6 words, 31 letters)
 Victors flank gyp who mixed job quiz. (7 words, 30 letters)
 Judges vomit; few quiz pharynx block. (6 words, 30 letters)
 How quickly daft jumping zebras vex. (6 words, 30 letters)
 Foxy nymphs grab quick-lived waltz. (5 words, 29 letters)
 Dub waltz, nymph, for quick jigs vex. (7 words, 28 letters, Stephen Smith)
 Blowzy frights vex, and jump quick. (6 words, 28 letters, magazine contest  1964)
 Why jab, vex quartz-damping flocks? (5 words, 28 letters, David J. Porter)
 Bawds jog, flick quartz, vex nymph. (6 words, 27 letters, Sir Jeremy Morse)
 Brick quiz whangs jumpy veldt fox. (6 words, 27 letters)
 Nth balks gyp, vex cwm fjord quiz. (7 words, 26 letters, Verbatim II-4)
 Quartz glyph job vex'd cwm finks. (6 words?, 26 letters)
 Cwm, fjord-bank glyphs vext quiz. (6 words, 26 letters, Dmitri Borgmann)
 Jumbling vext frowzy hacks PDQ. (5 words, 26 letters, Chris Cole)

Using words in 10C and NI3:

 Nth quark biz gyps cwm fjeld vox. (7 words, 26 letters, Verbatim II-4)
 Cwm kvutza qoph jynx fled brigs. (6 words, 26 letters, Greg and Peter Maggs)
 Pyx vang quiz: komb crwth fjelds. (6 words, 26 letters, Robert N. Test)
 Veldt jynx grimps waqf zho buck. (6 words, 26 letters, Michael Jones)

Using words in 10C, NI3 and NI3+:

 Squdgy fez, blank jimp crwth vox. (6 words, 26 letters, Claude Shannon)

Using words in 10C, NI3, NI2 and NI2+:

 Pyx crwth fjeld, quok, vang, zimbs. (6 words, 26 letters, Rev. S. Ream)
 Phlegms fyrd wuz qvint jackbox. (5 words, 26 letters, Dmitri Borgmann)

Some reasonable pangrams using proper names:

 Waltz, nymph, for quick jigs vex Bud. (6 words + 1 name, 28 letters,
                                       magazine contest 1964)
 If Jack quiz bald nymphs grow vext. (6 words + 1 name, 28 letters,
                        A. Cyril Pearson, Pictured Puzzles and Word Play,
                        George Routledge and Sons, London, 1909, p. 195)
 Nth zigs block Qum dwarf jive pyx. (6 words + 1 name, 27 letters,
                                    Verbatim II-4))
 Nth black fjords vex Qum gyp wiz. (6 words + 1 name, 26 letters,
                                   Verbatim II-4))

Some exceptional panalphabetic word lists:

 jackbox viewfinder phlegmy quartz (4 words, 31 letters, Mary Hazard)
 benzoxycamphors quick-flowing juventude (3 words, 36 letters, Darryl Francis)

Some exceptional nearly panalphabetic isogrammatic word lists:

 blacksmith gunpowdery (2 words, 20 letters)
 humpbacks frowzy tingled (3 words, 22 letters)

Some exceptional panalphabetic word lists with letters in alphabetical order: Using only words in 10C:

 a BCD ef ghi jack limn op querist ulva wax oyez (11 words, 37 letters)
 ABC defog hijack limn op querist ulva wax oyez (9 words, 38 letters)

Using words in 10C and NI3:

 a BCD ef ghi jak limn op qres to uva wax oyez (12 words, 34 letters)
 ABC defy ghi jak limn op qres to uva wax oyez (11 words, 35 letters)
 ABC defy ghi jak limn opaquers turves wax oyez (9 words, 38 letters)
 scabicide afghani jokul manrope querist purview oxygenize (7 words, 51 letters)

Using words in 10C, NI3 and NI3+:

 a BCD ef ghi jak limn op QRS to uva wax yez (12 words, 32 letters)
 ABC defy ghi jak limn op QRS to uva wax yez (11 words, 33 letters)
 ab cad ef ghi jak limn op qre stun vow ox yez (12 words, 34 letters)
 ABC defy ghi jak limn op querist uva wax yez (10 words, 35 letters)

Using words in 10C, NI3, NI3+, NI2 and NI2+:

 ABC def ghi jak limn op qre struv wax yez (10 words, 32 letters)
 ABC def ghi jak limn opaquer struv wax yez (9 words, 34 letters)

Using words in 10C, NI3, NI3+, NI2, NI2+ and the OED:

 ABC defog hij klam nop QRS tu vow XYZ (9 words, 29 letters, Jeff Grant)
 ABC def ghi jak limn op qres tu vow XYZ (10 words, 30 letters)
 ABC defog hij klam nop querist uvrow XYZ (8 words, 33 letters, Jeff Grant)
 ABC defyghe bij sklim nop querist uvrow XYZ (8 words, 36 letters)
 ABC defog hijack limnophil querist uvrow XYZ (7 words, 38 letters, Jeff Grant)

Some exceptional panalphabetic word lists with letters in reverse alpha order: Using words from 10C:

 lazy ox ow vug tsar quip on milk jib hag fed cab a (13 words, 38 letters)
 lazy ox wave uts reequip on milk jihad gifted cabal (10 words, 42 letters)

Using words from 10C and NI3:

 lazy ox ow vug tsar quip on milk jib hag fed caba (12 words, 38 letters)
 lazy ox wave uts roque pon milk jihad gifted caba (10 words, 40 letters)

Using words from 10C, NI3 and NI2:

 zo yex wu vug tsar quip on milk jib hag fed caba (12 words, 37 letters)
 zo yex wave uts roque pon milk jihad gifted caba (10 words, 39 letters)

All words are main entries in 10C except the following:

 10C: ghi (at 'ghee'), vext (at 'vex'), blowzy (at 'blowsy')
 NI3: caba, fyrd, jak, opaquers, pon, qre(s), squdgy, uva
 NI3+: jimp, QRS (at 'QRS complex'), sklim, vox (at 'vox populi'), yez
 NI2: benzoxycamphors, jackbox, limnophil, quick-flowing, yex, zo
 NI2+: def, juventude, klam, quar, qvint, struv, tu, wuz
 OED: defyghe (at 'defy'), bij (at 'buy'), hij, nop, uvrow (at 'yuffrouw'),
        XYZ (at 'X')

It is fairly straightforward, if time-consuming, to search for minimal pangrams given a suitable lexicon, and the enclosed program does this. The run time is of the order of 20 MIPS-days if fed `Official Scrabble Words', a document nominally listing all sufficiently short words playable in tournament Scrabble in Britain.

I also enclose a lexicon which will reproduce the OSW results much more quickly.

The results are dominated by onomatopoeic interjections (`pst', `sh', etc.), and words borrowed from Welsh (`cwm', `crwth') and Arabic (`qat', `suq'). Other lexicons will contain a very different leavening of such words, and yield a very different set of pangrams.

Readers are invited to form sentences (or, less challenging, newspaper headlines) from these pangrams. Few are amenable to this sort of thing.

    -- Steve Thomas

 ankh
 bad
 bag
 bald
 balk
 balks
 band
 bandh
 bang
 bank
 bap
 bard
 barf
 bark
 bed
 beds
 beg
 bend
 benj
 berk
 berks
 bez
 bhang
 bid
 big
 bight
 bilk
 bink
 bird
 birds
 birk
 bisk
 biz
 blad
 blag
 bland
 blank
 bled
 blend
 blight
 blimp
 blin
 blind
 blink
 blintz
 blip
 blitz
 block
 blond
 blunk
 blunks
 bod
 bods
 bog
 bok
 boks
 bold
 bond
 bong
 bonk
 bonks
 bop
 bord
 bords
 bosk
 box
 brad
 brank
 bred
 brink
 brinks
 brod
 brods
 brog
 brogh
 broghs
 bud
 bug
 bugs
 bulk
 bulks
 bump
 bumps
 bund
 bunds
 bung
 bungs
 bunk
 bunks
 burd
 burds
 burg
 burgh
 burghs
 burk
 burks
 burp
 busk
 by
 ch
 crwth
 cwm
 cwms
 dab
 dag
 dak
 damp
 dap
 deb
 debs
 debt
 deft
 delf
 delfs
 delft
 delph
 delphs
 depth
 derv
 dervs
 dhak
 dib
 dig
 dight
 dink
 dinks
 dirk
 disk
 div
 divs
 dob
 dobs
 dog
 dop
 dorp
 dowf
 drab
 draft
 drib
 dribs
 drip
 drop
 drub
 drubs
 drunk
 drunks
 dub
 dug
 dugs
 dung
 dunk
 dunks
 dup
 dusk
 dwarf
 dzo
 dzos
 fad
 fag
 falx
 fank
 fard
 fax
 fed
 fend
 fends
 fenks
 fez
 fib
 fid
 fig
 fight
 fink
 firk
 fisk
 fix
 fiz
 fjord
 fjords
 flab
 flag
 flak
 flank
 flap
 flax
 fled
 fleg
 flex
 flight
 flimp
 flip
 flisk
 flix
 flog
 flogs
 flong
 flongs
 flop
 flops
 flub
 flump
 flumps
 flung
 flunk
 flux
 fob
 fobs
 fog
 fogs
 fold
 folds
 folk
 folks
 fond
 fonds
 fop
 fops
 ford
 fords
 fork
 forks
 fox
 frab
 frank
 frap
 fremd
 fright
 friz
 frog
 frond
 frump
 frumps
 fub
 fud
 fug
 fugs
 fund
 funds
 funk
 funks
 fy
 fyrd
 fyrds
 gab
 gad
 gamb
 gamp
 gap
 gawk
 gawp
 ged
 geld
 gib
 gid
 gif
 gild
 gink
 gip
 gju
 gjus
 gled
 glib
 glid
 glift
 glitz
 glob
 globs
 glyph
 glyphs
 gob
 god
 gold
 golf
 golfs
 golp
 golps
 gonk
 gov
 govs
 gowd
 gowf
 gowfs
 gowk
 gowks
 graft
 graph
 grub
 grypt
 gub
 gubs
 gulf
 gulfs
 gulp
 gulph
 gulphs
 gunk
 gup
 gym
 gymp
 gyp
 gyps
 hadj
 hank
 hyp
 hyps
 jab
 jag
 jak
 jamb
 jap
 jark
 jerk
 jerks
 jib
 jibs
 jig
 jimp
 jink
 jinks
 jinx
 jird
 jirds
 jiz
 job
 jobs
 jog
 jogs
 jud
 juds
 jug
 jugs
 junk
 junks
 jynx
 kang
 kant
 kaw
 keb
 kebs
 ked
 kef
 kefs
 keg
 kelp
 kemb
 kemp
 kep
 kerb
 kerbs
 kerf
 kerfs
 kex
 khan
 khud
 khuds
 kid
 kids
 kif
 kifs
 kight
 kild
 kiln
 kilp
 kind
 kinds
 king
 kip
 klepht
 knag
 knight
 knob
 knobs
 knub
 knubs
 kob
 kobs
 kond
 kop
 kops
 kraft
 krantz
 kranz
 kvetch
 ky
 kynd
 kynds
 lav
 lev
 lez
 link
 luz
 lynx
 mawk
 nabk
 nth
 pad
 park
 pawk
 pax
 ped
 peg
 pegh
 peghs
 pelf
 pelfs
 penk
 perk
 perv
 pervs
 phang
 phiz
 phlox
 pig
 pight
 pix
 pleb
 plebs
 pled
 plight
 plink
 plod
 plongd
 plonk
 pluck
 plug
 plumb
 plumbs
 plunk
 ply
 pod
 polk
 polks
 pong
 pork
 pox
 poz
 prex
 prod
 prof
 prog
 pst
 pub
 pud
 pug
 pugh
 pulk
 pulks
 punk
 pyx
 qat
 qats
 qibla
 qiblas
 quark
 quiz
 sh
 skelf
 skid
 skrump
 skug
 sphinx
 spiv
 squawk
 st
 sunk
 suq
 swiz
 sylph
 tank
 thilk
 tyg
 vamp
 van
 vang
 vant
 veg
 veld
 velds
 veldt
 vend
  vends
 verb
 verbs
 vet
 vex
 vibs
 vild
 vint
 vly
 vox
 vug
 vugs
 vuln
 waltz
 wank
 welkt
 whack
 zag
 zap
 zarf
 zax
 zed
 zek
 zeks
 zel
 zig
 zigs
 zimb
 zimbs
 zing
 zings
 zip
 zips
 zit
 zurf
 zurfs

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