HKEY_LOCAL_MACHINE\Software\Autodesk\AutoCAD\R20.0\ACAD-E001:409 What is ACAD-E001:409?
R20.0 is the release number, the this corresponds to AutoCAD 2015
These digits like E000:409 are a ProductID (E000) and a LocaleID (409).
The ProductID structure is a 4-digit value. However, prior to AutoCAD 2006, the ProductID structure was only 3-digits with a single [p] value. Due to the number of products based on AutoCAD, in AutoCAD 2006 structure was changed to 4-digits.
From AutoCAD 2006 forward, the structure is configured as "[n][r][pp]", where:
[n] = Number representing AutoCAD base release (see below)
[r] = Release number within AutoCAD base, reset to zero for every new n
[pp] = Product based on AutoCAD (see below)
ProductID Assignments (Assigned [n] Values)
F = AutoCAD 2016
E = AutoCAD 2015
D = AutoCAD 2014
B = AutoCAD 2013
A = AutoCAD 2012
9 = AutoCAD 2011
8 = AutoCAD 2010
7 = AutoCAD 2009
6 = AutoCAD 2008
5 = AutoCAD 2007
4 = AutoCAD 2006
3 = AutoCAD 2005
2 = AutoCAD 2004
1 = AutoCAD 2002
The LocaleID structure is a 4-character hex representation of the product's locale / language.
Here is a list of LocaleID - Language Abbreviation - Language
409 ENU English
407 DEU German
040C FRA French
410 ITA Italian
040A ESP Spanish
415 PLK Polish
040E HUN Hungarian
405 CSY Czech
419 RUS Russian
416 PTB Brazilian Portuguese
804 CHS Simplified Chinese
404 CHT Traditional Chinese
412 KOR Korean
411 JPN Japanese
ProductID's for AutoCAD 2016-based products:
F001 AutoCAD
ProductID's for AutoCAD 2015-based products:
E000 Autodesk Civil 3D
E001 AutoCAD (ACAD)
E00A AutoCAD OEM
E002 Map
E004 AutoCAD Architecture
E005 AutoCAD Mechanical (ACADM)
E006 Building Systems (AutoCAD MEP)
E007 AutoCAD Electrical (ACADE)
E009 AutoCAD LT (ACLT)
E013 Inventor Professional (AIP)
E016 AutoCAD P & ID - 2D
E017 AutoCAD Plant 3D
E022 Autodesk Utility Design
E028 DWG TrueView
E029 AutoCAD ecscad
E030 AutoCAD Structural Detailing
ProductID's for AutoCAD 2014-based products:
D000 Autodesk Civil 3D
D001 AutoCAD (ACAD)
D00A AutoCAD OEM
D002 Map
D004 AutoCAD Architecture
D005 AutoCAD Mechanical (ACADM)
D006 Building Systems
D007 AutoCAD Electrical (ACADE)
D009 AutoCAD LT (ACLT)
D013 Inventor Professional (AIP)
D016 AutoCAD P & ID - 2D
D017 AutoCAD Plant 3D
D022 Autodesk Utility Design
D028 DWG TrueView
D029 AutoCAD ecscad
D030 AutoCAD Structural Detailing
ProductID's for AutoCAD 2013-based products:
B000 Autodesk Civil 3D
B001 AutoCAD
B00A AutoCAD OEM
B002 Map
B004 AutoCAD Architecture
B005 AutoCAD Mechanical (ACADM)
B006 Building Systems
B007 AutoCAD Electrical (ACADE)
B009 AutoCAD LT
B013 Inventor Professional (AIP)
B016 AutoCAD P & ID - 2D
B017 AutoCAD Plant 3D
B022 Autodesk Utility Design
B028 DWG TrueView
B029 AutoCAD ecscad
B030 AutoCAD Structural Detailing
ProductID's for AutoCAD 2012-based products:
A000 Autodesk Civil 3D
A001 AutoCAD
A001 DwgViewer (DWGVIEWR)
A00A AutoCAD OEM (AOEM)
A002 Map
A003 Inventor Series (AIS)
A004 AutoCAD Architecture
A005 AutoCAD Mechanical (ACADM)
A006 Building Systems
A007 AutoCAD Electrical (ACADE)
A008 Land Desktop
A009 AutoCAD LT (ACLT)
A012 ADT for Raster Design
A013 Inventor Professional (AIP)
A014 Inventor Professional for Routed Systems (AIPRS)
A015 Inventor Professional for Simulation (AIPSIM)
A016 AutoCAD P & ID - 2D
A017 AutoCAD Plant 3D
A018 Civil 3D Land Desktop Companion
A022 Autodesk Utility Design
A023 Autodesk Topobase Client
A024 Autodesk Civil
A028 DWG TrueView
A029 AutoCAD ecscad
A030 AutoCAD Structural Detailing
ProductID's for AutoCAD 2011-based products:
9000 Autodesk Civil 3D
9001 AutoCAD (ACAD)
9001 DwgViewer (DWGVIEWR)
900A AutoCAD OEM (AOEM)
9002 Map
9003 Inventor Series (AIS)
9004 AutoCAD Architecture
9005 AutoCAD Mechanical (ACADM)
9006 Building Systems
9007 AutoCAD Electrical (ACADE)
9008 Land Desktop
9009 AutoCAD LT (ACLT)
9012 ADT for Raster Design
9013 Inventor Professional (AIP)
9014 Inventor Professional for Routed Systems (AIPRS)
9015 Inventor Professional for Simulation (AIPSIM)
9016 AutoCAD P & ID - 2D
9017 AutoCAD Plant 3D
9018 Civil 3D Land Desktop Companion
9022 Autodesk Utility Design
9023 Autodesk Topobase Client
9024 Autodesk Civil
9028 DWG TrueView
9029 AutoCAD ecscad
9030 AutoCAD Structural Detailing
Here is a listing of the LocaleId which indicates the language. The LocaleId starts with the number 4, then it is immediately followed by a hexadecimal number indicating the language.
HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\AutoCAD\R20.0\ACAD-ProductId:LocaleId
FYI: The hex number is defined in winnt.h e.g.
#define LANG_NEUTRAL 0x00
#define LANG_AFRIKAANS 0x36
#define LANG_ALBANIAN 0x1c
#define LANG_ARABIC 0x01
#define LANG_ARMENIAN 0x2b
#define LANG_ASSAMESE 0x4d
#define LANG_AZERI 0x2c
#define LANG_BASQUE 0x2d
#define LANG_BELARUSIAN 0x23
#define LANG_BENGALI 0x45
#define LANG_BULGARIAN 0x02
#define LANG_CATALAN 0x03
#define LANG_CHINESE 0x04
#define LANG_CROATIAN 0x1a
#define LANG_CZECH 0x05
#define LANG_DANISH 0x06
#define LANG_DUTCH 0x13
#define LANG_ENGLISH 0x09
#define LANG_ESTONIAN 0x25
#define LANG_FAEROESE 0x38
#define LANG_FARSI 0x29
#define LANG_FINNISH 0x0b
#define LANG_FRENCH 0x0c
#define LANG_GEORGIAN 0x37
#define LANG_GERMAN 0x07
#define LANG_GREEK 0x08
#define LANG_GUJARATI 0x47
#define LANG_HEBREW 0x0d
#define LANG_HINDI 0x39
#define LANG_HUNGARIAN 0x0e
#define LANG_ICELANDIC 0x0f
#define LANG_INDONESIAN 0x21
#define LANG_ITALIAN 0x10
#define LANG_JAPANESE 0x11
#define LANG_KANNADA 0x4b
#define LANG_KASHMIRI 0x60
#define LANG_KAZAK 0x3f
#define LANG_KONKANI 0x57
#define LANG_KOREAN 0x12
#define LANG_LATVIAN 0x26
#define LANG_LITHUANIAN 0x27
#define LANG_MACEDONIAN 0x2f
#define LANG_MALAY 0x3e
#define LANG_MALAYALAM 0x4c
#define LANG_MANIPURI 0x58
#define LANG_MARATHI 0x4e
#define LANG_NEPALI 0x61
#define LANG_NORWEGIAN 0x14
#define LANG_ORIYA 0x48
#define LANG_POLISH 0x15
#define LANG_PORTUGUESE 0x16
#define LANG_PUNJABI 0x46
#define LANG_ROMANIAN 0x18
#define LANG_RUSSIAN 0x19
#define LANG_SANSKRIT 0x4f
#define LANG_SERBIAN 0x1a
#define LANG_SINDHI 0x59
#define LANG_SLOVAK 0x1b
#define LANG_SLOVENIAN 0x24
#define LANG_SPANISH 0x0a
#define LANG_SWAHILI 0x41
#define LANG_SWEDISH 0x1d
#define LANG_TAMIL 0x49
#define LANG_TATAR 0x44
#define LANG_TELUGU 0x4a
#define LANG_THAI 0x1e
#define LANG_TURKISH 0x1f
#define LANG_UKRAINIAN 0x22
#define LANG_URDU 0x20
#define LANG_UZBEK 0x43
#define LANG_VIETNAMESE 0x2a