It's not clear enough that this is not meant to be comprehensive (lacking Amazon as htsh points out, and noted at the bottom of the graphic) but rather an somew

It's not clear enough that this is not meant to be comprehensive (lacking Amazon as htsh points out, and noted at the bottom of the graphic) but rather an somewhat arbitrary selection of companies for comparison. (I also personally know of at least two research labs with more servers than some of the boxes in this graphic.)