Findings

Single questions the book settles in public, with the working shown. Each one names the records it rests on, prints the grade of every figure, and says what it does not tell you.

They are free, and they are the same evidence the book is built from — the whole source bibliography and the gap register are published too.

• Is software development a fast-growing job in the United States?
  The widely quoted 15% bundles two occupations. Taken apart, software developers are projected at 15.8% and QA analysts and testers at 10.0%, from the Bureau of Labor Statistics' own detailed table.
• What does a tech certification cost to hold for ten years?
  Between $165 and $2,225, computed from each issuer's own published exam fee and renewal terms. The advertised exam price is not the price, and there are only three renewal mechanisms in the whole market.
• Which computing certifications can an individual not buy?
  Duck Creek, Workday, Guidewire and Epic certify only the people who already work on their platforms. None publishes an exam price, because there is no purchase to make.