Modular shelving and step assembly

A modular shelving assembly comprising:

• a plurality of shelving components that each include:
• a body,
• a male portion that extends from a first end of the body, the male portion having width and height dimensions that are both smaller than width and height dimensions of the body,
• a female portion that defines a void in a second end of the body that is opposite the first end of the body, the female portion being sized and shaped to receive the male portion of another said shelving component,
• first apertures defined by and extending through the male portion, and
• second apertures defined by and extending through the female portion;
• a plurality of posts that are sized and shaped to be inserted into overlapping apertures of said first and second apertures of a first shelving component and a second shelving component of said plurality of shelving components, the overlapping apertures comprising (i) a first aperture in the male portion of the first shelving component that has been inserted into a female portion of the second shelving component and (ii) a second aperture in the female portion of the second shelving component;
• a male end cap that includes a male portion that extends from a first end of the male end cap and that is configured to be inserted into an initial shelving component in a row of said shelving components with an open said female portion;
• and
• a female end cap that includes a female portion that defines a void and that is configured to receive a said male portion from a last shelving component in a row of said shelving components with an open said male portion.