Autodesk AUTOCAD 2006 Command Reference Manual page 736

Text symbols and Unicode strings
Name
Almost equal
Angle
Boundary line
Centerline
Delta
Electrical phase
Flow line
Identity
Initial length
Monument line
Not equal
Ohm
Omega
Plate/property line
Subscript 2
Squared
Cubed
712 | Chapter 14
Symbol Unicode
String
\U+2248
\U+2220
\U+E100
\U+2104
\U+0394
\U+0278
\U+E101
\U+2261
\U+E200
\U+E102
\U+2260
\U+2126
\U+03A9
\U+214A
\U+2082
\U+00B2
\U+00B3