This character is a Otro símbolo and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+2399 forms with similar adjacent characters prevents a line break inside it.
El Wikipedia tiene la siguiente información acerca de este punto de código:
Print Screen (often abbreviated Print Scrn, Prnt Scrn, Prnt Scr, Prt Scrn, Prt Scn, Prt Scr, Prt Sc, Pr Sc, or PS) is a key present on most PC keyboards. It is typically situated in the same section as the break key and scroll lock key. The print screen may share the same key as system request.
Representaciones
Sistema
Representación (click value to copy)
N.º
9113
UTF-8
E2 8E 99
UTF-16
23 99
UTF-32
00 00 23 99
URL-Quoted
%E2%8E%99
HTML hex reference
⎙
Mojibake mal de windows-1252
⎙
Codificación: GB18030 (hexadecimales bytes)
81 36 F6 37
RFC 5137
\u'2399'
Bash and Zsh inside echo -e
\u2399
C and C++
\u2399
C#
\u2399
CSS
\002399
Excel
=UNICHAR(9113)
Go
\u2399
JavaScript
\u2399
Modern JavaScript since ES6
\u{2399}
JSON
\u2399
Java
\u2399
Lua
\u{2399}
Matlab
char(9113)
Perl
"\x{2399}"
PHP
\u{2399}
PostgreSQL
U&'\2399'
PowerShell
`u{2399}
Python
\u2399
Ruby
\u{2399}
Rust
\u{2399}
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