simple Tektronix 4014 graphics demo in C, working in xterm's Tek4014 mode (accessible with ^[[?38h or by menu option or -t, escapable with ^[^C, clearable with ^[^L)
Newton describes some cases of harmonic motion arising from the three-body problem
xterm escape sequences, including the Tek 4014 repertoire
introduction to the metal reactivity series in #materials