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 ⋯)
65 +0 ⊕ # 0+ already in use
68 0* ⊛ #XXX alternatively ⍟
70 0% ⦼ # no circled percent, but close
74 0! ⦶ # no circled exclamation mark
75 .1 ․ # obvious location, even though ‥ and … are at inconsistent .. and 3:
77 !? ⸘ # now we have everything
78 <3 ♥ # easy alias to trigraph cH-
79 :) ☺ # easy alias to 0u
84 # obvious line drawing gaps
88 dD ╷ # goddamn! stupid arabic dad got there first
97 2- ╌ # exactly like to 3 and 4
101 BF ╳ # FD and BD combined; FB already in use
105 HW Ƕ # HV conflicts with vh line drawing
109 # old/middle english (uncommon)
110 WY Ƿ # replaced by UU, later W
115 S1 Ʃ # can't use SH or ES
116 s1 ʃ # can't use sh; keep es for subscript
120 !C ǀ # corresponding zulu letter
121 !Q ǃ # idem; !. for lookalike (previously ʗ)
122 !X ǁ # idem; !/ for lookalike (previously ʖ)
123 !A ǂ # Alveolar; !- looks alike, != even more so but already occupied
125 !R ‼ # Retroflex (or Repeated); !! looks alike but occupied
129 #es ₑ #TODO: move esh
142 #ts ₜ # both ts and Ts in use for Ћ
147 # superscripts (modifier letters)
148 AS ᵃ # alef was first for aS
153 #fS ᶠ # both fS and FS in use
161 #nS ⁿ # already present
174 # capital superscripts; avoid as most *S are in use
195 # expected but missing
198 #A0 Ǻ # normal A-ring already provided by AA
209 'i ͺ # spacing iota subscript (like "i for combining)
212 Ac ℀ # prefer common A-smallcap for ac
213 As ℁ # prefer common a-subscript for as
214 cu ℆ # co ís present though
222 a" ǟ # a1 # long umlauted, very similar to double acute
224 jo ё # io # consistent with ja/ju
246 l- ƚ # not really a macron, but wouldn't really make sense anyway otherwise
258 # middle tilde #XXX: not tilde above
263 ##n? ᵰ # already a tilde above
271 # not used all that much, better leave x) free
278 #I) Ȋ # )I exists, but should not confuse
288 # usage is similar to inverted breve, just as rare
311 #D2 Ɗ # in use by control char
318 f2 ƒ # looks like a cedilla
329 #P2 Ƥ # in use by control char
346 Y; Ƴ # not a hook below, but Y2 hook above is already present
348 Z2 Ȥ # looks like a cedilla
352 # curls (9 is mostly free because horns are so rare)
355 j9 ʝ # crossed-tail actually
365 #2/ ƻ # rarely used, and double dash is far more logical
373 # turned/inverted (trailing I is uncommon for lowercase, and already used thusly for !I, ?I and NI)
377 #EI Ǝ # would be confusing, as it's not uppercase schwa eI
378 eI ə # schwa, not turned E (latter is very uncommon)
390 #nI ᴎ # reversed capital N, but NI already in use
392 #RI ᴚ # conflicts with RI control char
401 oE ɶ # Oe also available, but E looks capital
403 Ap ɒ #XXX Ao? (AO in use)
416 Op ɤ #XXX oy would look alike
420 #lp ɬ #XXX: lb for 'belt'
430 mL ɰ # like rL (XXX mp?)
432 # small caps (also possible at *s)
441 # more from phonetics extensions
453 sC ꜱ # sc/Sc/SC in use
459 # hangeul jamo consonants at *J
481 # hangeul jamo vowels at *J
500 # hangeul jamo iotized vowels at *K (for Korean)
508 # under development or temporary
511 $PR ► # current PR should be TR
512 $PL ◄ # current PL should be TL
513 $'> ˆ # where to put ^?
514 $'? ˜ # where to put ~?
516 $?" ΅ # tonos+dialytika
542 # rfc (incorrectly?) maps double to heavy