AFAB stands for Assigned Female at Birth and can include: cisgender women, transgender men, and non-binary people assigned female at birth.
Literally "genderless", this term refers to people who do not identify with any gender.
AMAB stands for Assigned Male at Birth and can include: cisgender men, transgender women, non-binary people assigned male at birth.
Person who is not sexually attracted toward other people of any gender. Contrary to what might be thought, this does not mean that asexual people do not enjoy sexuality.
See "assigned sex at birth".
By law, at birth, every person is assigned a sex (male / female) based on the appearance of the external genitalia.