Radicals ( Radical179) seven strokes in Kanji;

dimensional, e.g.

hardware vs. software, e.g.
hardware is master and then software is slave,
software is master and then hardware is slave;
also see: ( plus, minus) doko WHERE plus is more likely to be hardware, on the other hand, minus is more likely to be software;

directional, e.g.

;

logical, e.g.

in Hiragana: attendant, retainer;
in Hiragana: captive, retainer, servant, slave, varlet;

in Kanji: retainer, subject;

Omi (i.e. ancient title name, family name, female given name, surname); Onoko (i.e. family name); Tomi (i.e. family name, surname);

in Hiragana: me ( i) usage, WHEN humble slave speaks to master;

numerological, e.g.

7;

structural, e.g.

;

Radicals;