HTML は

<META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=〜">

の「〜」の部分に Charset を指定することで文字コードをブラウザに判別させる ことができます。 Netscape バイナリのある部分を見ると、この Charset らしきデータが格納 されています。以下、その部分のリストを挙げますが、実際にテストした わけではないので、全てが認識しているという保証はありません。

charset Official NN3NN4
437

850

851

852

855

857

860

861

862

863

865

866

869

8859_1

8859_2

8859_3

8859_4

8859_5

8859_6

8859_7

8859_8

8859_9

904

Adobe-Standard-Encoding

Adobe-Symbol-Encoding

adobe-symbol-encoding
ANSI_X3.110-1983

ANSI_X3.4-1968

ansi_x3.4-1968
ANSI_X3.4-1986

ansi_x3.4-1986
arabic7

arabic

ASCII

ascii
ASMO-708

ASMO_449

Big5
big5
BS_4730

BS_viewdata

ca

chinese
CN-Big5
CN-GB-ISOIR165
CN-GB
cn

CNS11643

cp-ar

cp-gr

cp-is

cp037

cp038

CP1026

Cp1250

Cp1251

Cp1253

CP273

CP274

cp275

CP278

CP280

cp281

CP284

CP285

cp290

cp297

cp367
cp420

cp423

cp424

cp437

CP500

cp775

CP819

cp819
cp850

cp851

cp852

cp855

cp857

cp860

cp861

cp862

cp863

cp864

cp865

cp866

CP868

cp869

CP870

CP871

cp880

cp891

cp903

cp904

CP905

CP918

csa7-1

csa7-2

csAdobeStandardEncoding

csASCII
CSA_T500-1983

CSA_Z243.4-1985-1

CSA_Z243.4-1985-2

CSA_Z243.4-1985-gr

csBig5
csDECMCS

csDKUS

csEBCDICATDEA

csEBCDICCAFR

csEBCDICDKNO

csEBCDICDKNOA

csEBCDICES

csEBCDICESA

csEBCDICESS

csEBCDICFISE

csEBCDICFISEA

csEBCDICFR

csEBCDICIT

csEBCDICUK

csEBCDICUS

csEUCFixWidJapanese

csEUCKR
csEUCPkdFmtJapanese
csGB2312
csHalfWidthKatakana
csHPDesktop

csHPLegal

csHPMath8

csHPPiFont

csHPPSMath
csHPRoman8

csIBBM904

csIBM037

csIBM038

csIBM1026

csIBM273

csIBM274

csIBM275

csIBM277

csIBM278

csIBM280

csIBM281

csIBM284

csIBM285

csIBM290

csIBM297

csIBM420

csIBM423

csIBM424

csIBM500

csIBM851

csIBM855

csIBM857

csIBM860

csIBM861

csIBM863

csIBM864

csIBM865

csIBM866

csIBM868

csIBM869

csIBM870

csIBM871

csIBM880

csIBM891

csIBM903

csIBM905

csIBM918

csIBMEBCDICATDE

csIBMSymbols

csIBMThai

csINVARIANT

csISO102T617bit

csISO10367Box

csISO103T618bit

csISO10646UTF1

csISO10Swedish

csISO111ECMACyrillic

csISO11SwedishForNames

csISO121Canadian1

csISO122Canadian2

csISO123CSAZ24341985gr

csISO128T101G2

csISO139CSN369103

csISO13JISC6220jp

csISO141JUSIB1002

csISO143IECP271

csISO146Serbian

csISO147Macedonian

csISO14JISC6220ro

csISO150

csISO150GreekCCITT

csISO151Cuba

csISO153GOST1976874

csISO158Lap

csISO159JISX02121990
csISO15Italian

csISO16Portuguese

csISO17Spanish

csISO18Greek7Old

csISO19LatinGreek

csISO2022JP2
csISO2022JP
csISO2022KR
csISO2033

csISO21German

csISO25French

csISO27LatinGreek1

csISO2IntlRefVersion

csISO42JISC62261978

csISO47BSViewdata

csISO49INIS

csISO4UnitedKingdom

csISO50INIS8

csISO51INISCyrillic

csISO5427Cyrillic

csISO5428Greek

csISO57GB1988

csISO58GB231280
csISO60DanishNorwegian

csISO60Norwegian1

csISO61Norwegian2

csISO646basic1983

csISO646Danish

csISO6937Add

csISO69French

csISO70VideotexSupp1

csISO84Portuguese2

csISO85Spanish2

csISO86Hungarian

csISO87JISX0208

csISO88596E

csISO88596I

csISO88598E

csISO88598I

csISO8859Supp

csISO88Greek7

csISO89ASMO449

csISO90

csISO91JISC62291984a

csISO92JISC62991984b

csISO93JIS62291984badd

csISO94JIS62291984hand

csISO95JIS62291984handadd

csISO96JISC62291984kana

csISO99NAPLPS

csISOLatin1

csISOLatin2

csISOLatin3

csISOLatin4

csISOLatin5

csISOLatin6

csISOLatinArabic

csISOLatinCyrillic
csISOLatinGreek
csISOLatinHebrew

csISOTextComm

csJISEncoding

csKOI8R
csKSC56011987
csKSC5636

csMacintosh

csMicrosoftPublishing

csMnem

csMnemonic

csNATSDANO

csNATSDANOADD

csNATSSEFI

csNATSSEFIADD

CSN_369103

csPC775Baltic

csPC850Multilingual

csPC862LatinHebrew

csPC8CodePage437

csPC8DanishNorwegian

csPC8Turkish

csPCp852

csShiftJIS
csUCS4

csUnicode11
csUnicode11UTF7
csUnicode

csUnicodeASCII
csUnicodeIBM1261

csUnicodeIBM1264

csUnicodeIBM1265

csUnicodeIBM1276

csUnicodeIBM2039

csUnicodeLatin1
csUnidoceIBM1268

csUnknown8BiT

csUSDK

csVenturaInternational

csVenturaMath

csVenturaUS

csVIQR

csVISCII

csWindows30Latin1

csWindows31J

csWindows31Latin1

csWindows31Latin2

csWindows31Latin5
cuba

cyrillic
de

DEC-MCS

dec

DECTECH

DingBats

DIN_66003

dk-us

dk

DS2089

DS_2089

e13b

EBCDIC-AT-DE-A

EBCDIC-AT-DE

EBCDIC-BE

EBCDIC-BR

EBCDIC-CA-FR

ebcdic-cp-ar1

ebcdic-cp-ar2

ebcdic-cp-be

ebcdic-cp-ca

ebcdic-cp-ch

EBCDIC-CP-DK

ebcdic-cp-es

ebcdic-cp-fi

ebcdic-cp-fr

ebcdic-cp-gb

ebcdic-cp-gr

ebcdic-cp-he

ebcdic-cp-is

ebcdic-cp-it

ebcdic-cp-nl

EBCDIC-CP-NO

ebcdic-cp-roece

ebcdic-cp-se

ebcdic-cp-tr

ebcdic-cp-us

ebcdic-cp-wt

ebcdic-cp-yu

EBCDIC-Cyrillic

EBCDIC-DK-NO-A

EBCDIC-DK-NO

EBCDIC-ES-A

EBCDIC-ES-S

EBCDIC-ES

EBCDIC-FI-SE-A

EBCDIC-FI-SE

EBCDIC-FR

EBCDIC-INT

EBCDIC-IT

EBCDIC-JP-E

EBCDIC-JP-kana

EBCDIC-PT

EBCDIC-UK

EBCDIC-US

ECMA-114

ECMA-118

ecma-118
ECMA-cyrillic

ELOT_928

elot_928
ES2

ES

EUC-JP

euc-jp
EUC-KR
euc-kr

EUC

Extended_UNIX_Code_Fixed_Width_for_Japanese

Extended_UNIX_Code_Packed_Format_for_Japanese
FI

fr

GB2312
gb2312
gb

GB_1988-80

GB_2312-80

gb_2312-80
GOST_19768-74

greek-ccitt

greek7-old

greek7

greek8
greek
hebrew

HP-DeskTop

HP-Legal

HP-Math8

HP-Pi-font

hp-roman8

hu

HZ-GB-2312

IBM-Symbols

IBM-Thai

IBM037

IBM038

IBM1026

IBM273

IBM274

IBM275

IBM277

IBM278

IBM280

IBM281

IBM284

IBM285

IBM290

IBM297

IBM367

ibm367
IBM420

IBM423

IBM424

IBM437

IBM500

IBM775

IBM819

ibm819
IBM850

IBM851

IBM852

IBM855

IBM857

IBM860

IBM861

IBM862

IBM863

IBM864

IBM865

IBM866

IBM868

IBM869

IBM870

IBM871

IBM880

IBM891

IBM903

IBM904

IBM905

IBM918

IEC_P27-1

INIS-8

INIS-cyrillic

INIS

INVARIANT

irv

ISO-10646-J-1
ISO-10646-UCS-2
ISO-10646-UCS-4
ISO-10646-UCS-Basic

ISO-10646-UCS-BASIC

ISO-10646-Unicode-Latin1
ISO-10646-UTF-1

ISO-10646
ISO-2022-CN-EXT

ISO-2022-CN

ISO-2022-JP-2

iso-2022-jp-2
ISO-2022-JP

iso-2022-jp
ISO-2022-KR

iso-2022-kr
ISO-8859-1-Windows-3.0-Latin-1
ISO-8859-1-Windows-3.1-Latin-1
ISO-8859-1

iso-8859-1
ISO-8859-2-Windows-Latin-2
ISO-8859-2

iso-8859-2
ISO-8859-3

iso-8859-3
ISO-8859-4

iso-8859-4

iso-8859-5-windows-latin-5
ISO-8859-5

iso-8859-5
ISO-8859-6

iso-8859-6
ISO-8859-7

iso-8859-7
ISO-8859-8

iso-8859-8
ISO-8859-9-Windows-Latin-5

ISO-8859-9

iso-8859-9
iso-ir-100
iso-ir-101
iso-ir-102

iso-ir-103

iso-ir-109

iso-ir-10

iso-ir-110

iso-ir-111

iso-ir-11

iso-ir-121

iso-ir-122

iso-ir-123

iso-ir-126
iso-ir-127

iso-ir-128

iso-ir-138

iso-ir-139

iso-ir-13

iso-ir-141

iso-ir-142

iso-ir-143

iso-ir-144
iso-ir-146

iso-ir-147

iso-ir-148

iso-ir-149
iso-ir-14

iso-ir-150

iso-ir-151

iso-ir-152

iso-ir-153

iso-ir-154

iso-ir-155

iso-ir-157

iso-ir-158

iso-ir-159
iso-ir-15

iso-ir-16

iso-ir-17

iso-ir-18

iso-ir-19

iso-ir-21

iso-ir-25

iso-ir-27

iso-ir-2

iso-ir-37

iso-ir-42

iso-ir-47

iso-ir-49

iso-ir-4

iso-ir-50

iso-ir-51

iso-ir-54

iso-ir-55

iso-ir-57

iso-ir-58
iso-ir-60

iso-ir-61

iso-ir-69

iso-ir-6
iso-ir-70

iso-ir-8-1

iso-ir-8-2

iso-ir-84

iso-ir-85

iso-ir-86

iso-ir-87

iso-ir-88

iso-ir-89

iso-ir-9-1

iso-ir-9-2

iso-ir-90

iso-ir-91

iso-ir-92

iso-ir-93

iso-ir-94

iso-ir-95

iso-ir-96

iso-ir-98

iso-ir-99

ISO-Unicode-IBM-1261

ISO-Unicode-IBM-1264

ISO-Unicode-IBM-1265

ISO-Unicode-IBM-1268

ISO-Unicode-IBM-1276

ISO5427Cyrillic1981

ISO646-CA2

ISO646-CA

ISO646-CN

ISO646-CU

ISO646-DE

ISO646-DK

ISO646-ES2

ISO646-ES

ISO646-FI

ISO646-FR1

ISO646-FR

ISO646-GB

ISO646-HU

ISO646-IT

ISO646-JP-OCR-B

ISO646-JP

ISO646-KR

ISO646-NO2

ISO646-NO

ISO646-PT2

ISO646-PT

ISO646-SE2

ISO646-SE

ISO646-US

iso646-us
ISO646-YU

ISO_10367-box

ISO_2033-1983

ISO_5427:1981

ISO_5427

ISO_5428:1980

ISO_646.basic:1983

ISO_646.irv:1983

ISO_646.irv:1991

iso_646.irv:1991
ISO_6937-2-25

ISO_6937-2-add

ISO_8859-10:1992

ISO_8859-1:1987

iso_8859-1:1987
ISO_8859-1

iso_8859-1
ISO_8859-2:1987

iso_8859-2:1987
ISO_8859-2

iso_8859-2
ISO_8859-3:1988

ISO_8859-3

ISO_8859-4:1988

ISO_8859-4

ISO_8859-5:1988

iso_8859-5:1988
ISO_8859-5

iso_8859-5
ISO_8859-6-E

ISO_8859-6-I

ISO_8859-6:1987

ISO_8859-6

ISO_8859-7:1987

iso_8859-7:1987
ISO_8859-7

iso_8859-7
ISO_8859-8-E

ISO_8859-8-I

ISO_8859-8:1988

ISO_8859-8

ISO_8859-9:1989

ISO_8859-9

ISO_8859-supp

ISO_9036

IT

JIS0208

JIS

JIS_C6220-1969-jp

JIS_C6220-1969-ro

JIS_C6220-1969

JIS_C6226-1978

JIS_C6226-1983

JIS_C6229-1984-a

JIS_C6229-1984-b-add

JIS_C6229-1984-b

JIS_C6229-1984-hand-add

JIS_C6229-1984-hand

JIS_C6229-1984-kana

JIS_Encoding

JIS_X0201

jis_x0201
JIS_X0208-1983

jis_x0208-1983
JIS_X0212-1990

jis_x0212-1990
jp-ocr-a

jp-ocr-b-add

jp-ocr-b

jp-ocr-hand-add

jp-ocr-hand

jp

js

JUS_I.B1.002

JUS_I.B1.003-mac

JUS_I.B1.003-serb

katakana

KOI8-R

koi8-r
KOI8-U

KOI8

korean
KR2022

KSC5601

KSC5636

KSC_5601

ksc_5601

KS_C_5601-1987

ks_c_5601-1987
KS_C_5601-1989

ks_c_5601-1989
ks_c_5601
l1
l2
l3

l4

l5

l6

lap

Latin-greek-1

latin-greek

latin-lap

latin1-2-5

latin1
latin2
latin3

latin4

latin5

latin6

mac

MacCentralEurope

MacCyrillic

macedonian

MacGreek

macintosh

MacRoman

MacTurkish

Microsoft-Publishing

MNEM

MNEMONIC

MSZ_7795.3

MS_Kanji

ms_Kanji
NAPLPS

NATS-DANO-ADD

NATS-DANO

NATS-SEFI-ADD

NATS-SEFI

NC_NC00-10:81

NF_Z_62-010

NF_Z_62-010_(1973)

no2

no

NS_4551-1

NS_4551-2

PC8-Danish-Norwegian

PC8-Turkish

PT2

PT

r8

ref

roman8

se2

se

SEN_850200_B

SEN_850200_C

serbian

Shift_JIS
SJIS

ST_SEV_358-88

Symbol

T.101-G2

T.61-7bit

T.61-8bit

T.61

TIS-620

TIS620

UCS2

UCS4

uk

UNICODE-1-1-UTF-7
UNICODE-1-1-UTF-8
UNICODE-1-1

UNICODE-2-0-UTF-7

UNKNOWN-8BIT

US-ASCII

us-ascii
us-dk

us
UTF-7
UTF-8
UTF7

UTF8

Ventura-International

Ventura-Math

Ventura-US

videotex-suppl

VIQR

VISCII

windows-1250
windows-1251
windows-1253
windows-1254
windows-1255

windows-1256

windows-1257

windows-1258

Windows-31J
x-cns11643-1110
x-cns11643-1
x-cns11643-2
x-cp1250
x-cp1251
x-cp1253

x-dectech
x-default

x-dingbats
x-euc-jp
x-euc-tw
x-gb2312-11
x-imap4-modified-utf7

x-jisx0208-11
x-ksc5601-11
x-mac-ce
x-mac-cyrillic
x-mac-greek
x-mac-roman
x-mac-turkish
x-sjis
x-tis620
x-UNICODE-2-0-UTF-7

x-user-defined
x-x-big5
x0201-7

X0201

x0201
x0208

x0212
yu


META要素としてcharasetを指定するのは日本のみで通用するらしい。