It looks like the "tech" category reported on those graphs is including technicians, which make up very different percentages of the workforce at the two compan

It looks like the "tech" category reported on those graphs is including technicians, which make up very different percentages of the workforce at the two companies -- about 1% of Google's employees and 22% of Apple's, according to their EEO-1 forms: https://static.googleusercontent.com/media/www.google.com/en//diversity/pdf/google_2014_certified_eeo-1_reports_12-12-14.pdf https://static.googleusercontent.com/media/www.google.com/en... https://www.apple.com/diversity/pdf/2015-EEO-1-Consolidated-Report.pdf https://www.apple.com/diversity/pdf/2015-EEO-1-Consolidated-... Within the "professionals" category, which is the one with engineers in it, both have pretty similar percentages of black employees: about 1.7% at Google, compared to... about 1.7% at Apple.