There are several non-standard font encoding schemes for Tamil. Then there are a whole lot of fonts (used mostly by publishing houses in Tamil Nadu, such as Vikatan, Kumutham, thinamaNi, etc.) which do not comply with any of these. The three major font encoding schemes are;
TSCII (Tamil Standard Code of Information Interchange - currently running in beta version 1.7); the first efforts by volunteers throughout world.
TAB (TAmil Bilingual); proposed and approved by the Tamil Nadu government
TSCII 1.6 Encoding Table
vowels: a, aa/A, i, ii/I, u, uu/U, e, ee/E, ai, o, oo/O, au, aq
consonants: k, ng, c, ny, t, N, th, n^, p, m, y, r, l, v, zh, L, R, n
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Position | character name | TSCII glyph
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Characters 0-127 are as in the standard lower ASCII set
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128 80 | c128 | tamil numeral 0
129 81 | c129 | tamil numeral 1
130 82 | baseline single quote | tamil numeral 2
131 83 | florin | tamil numeral 3
132 84 | baseline double quote | tamil numeral 4
133 85 | ellipsis | tamil numeral 5
134 86 | dagger (single) | tamil numeral 6
135 87 | dagger (double) | tamil numeral 7
136 88 | circumflex | tamil numeral 8
137 89 | per mil (thousand) | tamil numeral 9
138 8A | S caron | modifier for aa/A
139 8B | left single guillemet | modifier for I
140 8C | OE ligature | modifier for Ii/I
141 8D | c141 | modifier for u
142 8E | c142 | modifier for uu/U
143 8F | c143 | modifier for e
144 90 | c144 | modifier for ee/E
145 91 | open single quote | (left single guillemet)
146 92 | close single quote | (right single guillemet )
147 93 | open double quote | (left double guillemet)
148 94 | close double quote | (right double guillemet )
149 95 | bullet (large) | tamil numeral 10
150 96 | en dash | tamil numeral 100
151 97 | em dash | tamil numeral 1000
152 98 | tilde | modifier for ai
153 99 | unregistered trademark | tamil vowel a
154 9A | s caron | tamil vowel aa/A
155 9B | right single guillemet | tamil vowel i
156 9C | oe ligature | tamil vowel ii/Ai
157 9D | c157 | tamil vowel u
158 9E | c158 | tamil vowel uu/U
159 9F | Y diaeresis | tamil vowel e
160 A0 | non-breaking space | (vacant)
161 A1 | Spanish inverted ! | tamil vowel ee/E
162 A2 | cents | tamil vowel ai
163 A3 | pounds | tamil vowel o
164 A4 | intl. monetary symbol | tamil vowel oo/O
165 A5 | yen | tamil vowel au
166 A6 | broken bar | tamil vowel aq
167 A7 | section symbol | tamil uyirmei ka
168 A8 | diaeresis | tamil uyirmei nga
169 A9 | copyright | copyright
170 AA | feminine ordinal | tamil uyirmei ca
171 AB | left double guillemet | tamil uyirmei nya
172 AC | logicalnot | tamil uyirmei ta
173 AD | soft hyphen (minus) | tamil uyirmei Na
174 AE | registered trademark | registered trademark
175 AF | macron | tamil uyirmei tha
176 B0 | ring (also degrees) | tamil uyirmei n^a
177 B1 | plus/minus | tamil uyirmei pa
178 B2 | superscript 2 | tamil uyirmei ma
179 B3 | superscript 3 | tamil uyirmei ya
180 B4 | acute | tamil uyirmei ra
181 B5 | micro symbol (or mu) | tamil uyirmei la
182 B6 | pilcrow (paragraph) | tamil uyirmei va
183 B7 | bullet (small) | bullet (small)
184 B8 | cedilla | tamil uyirmei zha
185 B9 | superscript 1 | tamil uyirmei La
186 BA | masculine ordinal | tamil uyirmei Ra
187 BB | right double guillemet | tamil uyirmei na
188 BC | one-fourth | grantha letter ja
189 BD | one-half | grantha letter sha
190 BE | three-fourths | grantha letter sa
191 BF | Spanish inverted ? | grantha letter ha
192 C0 | A grave | grantha letter ksha
193 C1 | A acute| | grantha letter sri
194 C2 | A circumflex | tamil uyirmei ti/di
195 C3 | A tilde | tamil uyirmei tii/dii
196 C4 | A diaeresis | tamil uyirmei ku
197 C5 | A ring | tamil uyirmei ngu
198 C6 | AE ligature | tamil uyirmei cu
199 C7 | C cedilla | tamil uyirmei nyu
200 C8 | E grave | tamil uyirmei tu
201 C9 | E acute | tamil uyirmei Nu
202 CA | E circumflex | tamil uyirmei thu
203 CB | E diaeresis | tamil uyirmei n^u
204 CC | I grave | tamil uyirmei pu
205 CD | I acute | tamil uyirmei mu
206 CE | I circumflex | tamil uyirmei yu
207 CF | I diaeresis | tamil uyirmei ru
208 D0 | Icelandic Eth | tamil uyirmei lu
209 D1 | N tilde | tamil uyirmei vu
210 D2 | O grave | tamil uyirmei zhu
211 D3 | O acute | tamil uyirmei Lu
212 D4 | O circumflex | tamil uyirmei Ru
213 D5 | O tilde | tamil uyirmei nu
214 D6 | O diaeresis | tamil uyirmei kU
215 D7 | multiply symbol | tamil uyirmei ngU
216 D8 | O with oblique stroke | tamil uyirmei cU
217 D9 | U grave | tamil uyirmei nyU
218 DA | U acute | tamil uyirmei tU
219 DB | U circumflex | tamil uyirmei NU
220 DC | U diaeresis | tamil uyirmei thU
221 DD | Y acute | tamil uyirmei n^U
222 DE | Icelandic Thorn | tamil uyirmei pU
223 DF | German sharp s | tamil uyirmei mU
224 E0 | a grave | tamil uyirmei yU
225 E1 | a acute | tamil uyirmei rU
226 E2 | a circumflex | tamil uyirmei lU
227 E3 | a tilde | tamil uyirmei vU
228 E4 | a diaeresis | tamil uyirmei zhU
229 E5 | a ring | tamil uyirmei LU
230 E6 | ae ligature | tamil uyirmei RU
231 E7 | c cedilla | tamil uyirmei nU
232 E8 | e grave | tamil vowel k (ik)
233 E9 | e acute | tamil vowel ng (ing)
234 EA | e circumflex | tamil vowel c (ikc)
235 EB | e diaeresis | tamil vowel ny (iny)
236 EC | i grave | tamil vowel t (it)
237 ED | i acute | tamil vowel N (iN)
238 EE | i circumflex | tamil vowel th (ith)
239 EF | i diaeresis | tamil vowel n (in^)
240 F0 | Icelandic eth | tamil vowel p (ip)
241 F1 | n tilde | tamil vowel m (im)
242 F2 | o grave | tamil vowel y (i<)
243 F3 | o acute | tamil vowel r (ir)
244 F4 | o circumflex | tamil vowel l (il)
245 F5 | o tilde | tamil vowel v (iv)
246 F6 | o diaeresis | tamil vowel zh (izh)
247 F7 | divide symbol | tamil vowel L (iL)
248 F8 | o with oblique stroke | tamil vowel R (iR)
249 F9 | u grave | tamil vowel n (in)
250 FA | u acute | grantha vowel j (ij)
251 FB | u circumflex | grantha vowel sh (ish)
252 FC | u diaeresis | grantha vowel s (is)
253 FD | y acute | grantha vowel h (ih)
254 FE | Icelandic thorn | grantha vowel ksh (iksh)
255 FF | y diaeresis | (vacant)
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