Crossword puzzle clue "multibillion dollar corporation with four size options all hidden in this grid"

Multibillion-dollar corporation with four size options all hidden in this grid

Set of which all seven elements are fittingly hidden in the solved puzzle grid

Angle irons graphically represented by four sets of black squares in this grid, and by letter formations starting in the four longest answers

Joins forces, or the hidden four-letter words in four Down answers

Sportsman with a rifle, ... and what you are, while looking for the nine hidden answers in this solution grid word search-style

Feature hidden in the starred answers (and suggested by the grid's center)

Web concerns ... and based on six familiar names hidden in rows 1, 4, 12 and 15 of this puzzle grid, what the black squares in those rows symbolize

16 of these are hidden in the answer grid, each reading left, right, up, down or diagonally in an unbroken straight line