This code point first appeared in version 1.1 of the Unicode® Standard and belongs to the "Latin-1 Supplement" block which goes from 0x80 to 0xFF.
You can safely add this character in your html code with the entity: 
It is sometimes abbreviated as DCS.
As a control character, it can be referenced as DEVICE CONTROL STRING.
You can use the u+0090 copy pc button below.
Easy u+0090 copy paste:
Unicode meta-data
The following table show specific meta-data that is known about this character.The u+0090 name is device control string emoji.
| field | value |
|---|---|
| Codepoint (hex) | 0090, u0090 |
| Character age | Unicode 1.1 |
| Legacy name (Unicode 1.0) | DEVICE CONTROL STRING |
| Official name (Unicode 15.0) | - |
| resolved name | device control string |
| block | Latin-1 Supplement (Latin_1_Sup) |
| common typos | u+0090, u+9000 |
There are alternative spelling that can be found in the wild for the unicode character 0090 like u 0090, (u+0090) or u +0090. You can also find u-0090, u*0090, un+0090, u0090, u=0090 or c+0090. You can also spell it with u 0090 unicode, u plus 0090, uncode 0090 or unicode + 0090.
Its bidirectional class is "BN":Boundary Neutral (Default ignorables, non-characters, and control characters, other than those explicitly given other types.)
Glyphs and symbols in your browser
The following unicode chart presents different versions of the glyph corresponding to the unicode characters u+0090 that are available on your computer.
In order to type this character easily, you may want to download and install a unicode Latin-1 Supplement keyboard.
A sample of fonts are used below to display whether the character has a glyph in this font or not.
Encodings (Unicode characters converter)
The following character table converter for +u0090 allows you to see the value of the character in different encodings
| encoding | hexadecimal | decimal | binary |
|---|---|---|---|
| UTF-8 | C2 90 | 49808 | 11000010 10010000 |
| UCS2 | 90 00 | 36864 | 10010000 00000000 |
| UTF-16LE | 90 00 | 36864 | 10010000 00000000 |
| UTF-16BE | 00 90 | 144 | 10010000 |
| UTF7 | 2B 41 4A 41 2D | 185778979117 | 00101011 01000001 01001010 01000001 00101101 |
| UTF7-IMAP | 26 41 4A 41 2D | 164304142637 | 00100110 01000001 01001010 01000001 00101101 |