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
110 # expected but missing
113 #A0 Ǻ # normal A-ring already provided by AA
124 #ac ℀ # prefer common A-smallCap
126 cu ℆ # co ís present though
130 a" ǟ # a1 # long umlauted, very similar to double acute
132 jo ё # io # consistent with ja/ju
148 l- ƚ # not really a macron, but wouldn't really make sense anyway otherwise
160 # middle tilde #XXX: not tilde above
165 ##n? ᵰ # already a tilde above
173 # not used all that much, better leave x) free
180 #I) Ȋ # )I exists, but should not confuse
190 # usage is similar to inverted breve, just as rare
213 #D2 Ɗ # in use by control char
220 f2 ƒ # looks like a cedilla
231 #P2 Ƥ # in use by control char
246 Y; Ƴ # not a hook below, but Y2 hook above is already present
248 Z2 Ȥ # looks like a cedilla
252 # curls (9 is mostly free because horns are so rare)
255 j9 ʝ # crossed-tail actually
265 #2/ ƻ # rarely used, and double dash is far more logical
273 # turned/inverted (trailing I is uncommon for lowercase, and already used thusly for !I, ?I and NI)
276 #EI Ǝ # would be confusing, as it's not uppercase schwa eI
277 eI ə # schwa, not turned E (latter is very uncommon)
289 #nI ᴎ # reversed capital N, but NI already in use
291 #RI ᴚ # conflicts with RI control char
300 oE ɶ # Oe also available, but E looks capital
302 Ap ɒ #XXX Ao? (AO in use)
315 Op ɤ #XXX oy would look alike
319 #lp ɬ #XXX: lb for 'belt'
329 mL ɰ # like rL (XXX mp?)
331 # small caps (also possible at *s)
340 # more from phonetics extensions
352 sC ꜱ # sc/Sc/SC in use
358 # ipa releases (ⁿ already present as nS)
364 # hangeul jamo consonants at *J
386 # hangeul jamo vowels at *J
405 # hangeul jamo iotized vowels at *K (for Korean)
413 # under development or temporary
416 $PR ► # current PR should be TR
417 $PL ◄ # current PL should be TL
418 $'> ˆ # where to put ^?
419 $'? ˜ # where to put ~?
421 $?" ΅ # tonos+dialytika
438 $,i ͺ # spacing iota subscript
448 # rfc (incorrectly?) maps double to heavy