1 # common meaning of second character
17 ; Ogonek (+Retroflex Hook/Tail)
29 % Greek/Cyrillic special
30 + lc: Arabic, uc: Hebrew
31 3 some Latin/Greek/Cyrillic letters
33 5 Hiragana (also lc + a/e/i/o/u)
34 6 Katakana (also uc + a/e/i/o/u)
35 J + Korean Jamo (also K)
38 # common first character
45 =e € # as found in vim
46 Eu € # as found in zsh
48 =N ₦ #XXX =n for consistency?
57 3: … # opposite of ⋮ (more logical would be to swap with .3 ⋯)
60 .1 ․ # obvious location, even though ‥ and … are at inconsistent .. and 3:
62 <3 ♥ # easy alias to trigraph cH-
63 :) ☺ # easy alias to 0u
68 # obvious line drawing gaps
72 dD ╷ # goddamn! stupid arabic dad got there first
81 2- ╌ # exactly like to 3 and 4
85 BF ╳ # FD and BD combined; FB already in use
89 HW Ƕ # HV conflicts with vh line drawing
93 # old/middle english (uncommon)
94 #WY Ƿ # replaced by UU, later W
97 #Gy ȝ # do not use yy to keep y column clear
99 S1 Ʃ # can't use SH or ES
100 s1 ʃ # can't use sh; keep es for subscript
104 !C ǀ # corresponding zulu letter
105 !Q ǃ # idem; !. would be much more intuitive (previously ʗ)
106 !X ǁ # idem; or !/ (previously ʖ)
107 !A ǂ # Alveolar; !- looks alike, != even more so but already occupied
112 #es ₑ #TODO: move esh
125 #ts ₜ # both ts and Ts in use for Ћ
130 # superscripts (modifier letters)
131 AS ᵃ # alef was first for aS
136 #fS ᶠ # both fS and FS in use
144 #nS ⁿ # already present
157 # capital superscripts; avoid as most *S are in use
178 # expected but missing
181 #A0 Ǻ # normal A-ring already provided by AA
192 Ac ℀ # prefer common A-smallcap for ac
193 As ℁ # prefer common a-subscript for as
194 cu ℆ # co ís present though
198 a" ǟ # a1 # long umlauted, very similar to double acute
200 jo ё # io # consistent with ja/ju
216 l- ƚ # not really a macron, but wouldn't really make sense anyway otherwise
228 # middle tilde #XXX: not tilde above
233 ##n? ᵰ # already a tilde above
241 # not used all that much, better leave x) free
248 #I) Ȋ # )I exists, but should not confuse
258 # usage is similar to inverted breve, just as rare
281 #D2 Ɗ # in use by control char
288 f2 ƒ # looks like a cedilla
299 #P2 Ƥ # in use by control char
314 Y; Ƴ # not a hook below, but Y2 hook above is already present
316 Z2 Ȥ # looks like a cedilla
320 # curls (9 is mostly free because horns are so rare)
323 j9 ʝ # crossed-tail actually
333 #2/ ƻ # rarely used, and double dash is far more logical
341 # turned/inverted (trailing I is uncommon for lowercase, and already used thusly for !I, ?I and NI)
344 #EI Ǝ # would be confusing, as it's not uppercase schwa eI
345 eI ə # schwa, not turned E (latter is very uncommon)
357 #nI ᴎ # reversed capital N, but NI already in use
359 #RI ᴚ # conflicts with RI control char
368 oE ɶ # Oe also available, but E looks capital
370 Ap ɒ #XXX Ao? (AO in use)
383 Op ɤ #XXX oy would look alike
387 #lp ɬ #XXX: lb for 'belt'
397 mL ɰ # like rL (XXX mp?)
399 # small caps (also possible at *s)
408 # more from phonetics extensions
420 sC ꜱ # sc/Sc/SC in use
426 # hangeul jamo consonants at *J
448 # hangeul jamo vowels at *J
467 # hangeul jamo iotized vowels at *K (for Korean)
475 # under development or temporary
478 $PR ► # current PR should be TR
479 $PL ◄ # current PL should be TL
480 $'> ˆ # where to put ^?
481 $'? ˜ # where to put ~?
483 $?" ΅ # tonos+dialytika
500 $,i ͺ # spacing iota subscript
510 # rfc (incorrectly?) maps double to heavy