Where do they get or make such abstractions for logos?

Question

Design

These are:

Where do they get the blanks of these figures, or do they draw them themselves? In what program?

Answer 1

Adobe Illustrator, Inkscape, CorelDRAW..or other vector editor. Everything is done by hand, it's not that hard.

Answer 2

CorelDRAW - vector editor.
Circles, ellipses, rhombuses, polygons, spirals - in Tools.
Crossings, overlaps are made.
And look on the Internet Cliparts for Korel - a bunch of all sorts of blanks.