Print your system's logo
GFA BASIC on Atari ST, 27 bytes
This is a manually edited source code in .LST format. It contains unprintable characters: [SO] and [SI] stand for ASCII characters #14 and #15 respectively. Both lines ends with CR.
DEFTEXT,,,32
TEXT0,28,&quot;[SO][SI]&quot;

This will draw a 28x26 Atari logo, which is part of the Atari ST system font.