Three plain overlapping circles in a row.

Three Overlapping Circles

A row of three identical plain drops or flames.

Three Drops Or Flames

A hidden password or a row of three asterisks with a shadow.

Three abstract books standing up in a row.

Three capital letters in a row that reads CSC.

A coniferous tree behind a row of three bushes.

A stack of three computer servers with a row of three lights on each.