1 Subjects: “...Tools / Design and construction / http://id.loc.gov/authorities/subjects/sh2001000754...”

2 Subjects: “...Electronics / http://id.loc.gov/authorities/subjects/sh85042383...”

3 Subjects: “...High-fidelity sound systems / http://id.loc.gov/authorities/subjects/sh85060673...”

4 Subjects: “...LEGO toys / http://id.loc.gov/authorities/subjects/sh86008105...”

5 Subjects: “...Computer sound processing / http://id.loc.gov/authorities/subjects/sh85029539...”

6 Subjects: “...Cutting machines / http://id.loc.gov/authorities/subjects/sh85035012...”

7 Subjects: “...Cutting machines / http://id.loc.gov/authorities/subjects/sh85035012...”

8 Subjects: “...Milling-machines / http://id.loc.gov/authorities/subjects/sh85085415...”

9 Subjects: “...Makerspaces / http://id.loc.gov/authorities/subjects/sh2014000535...”

10 Subjects: “...Internetworking (Telecommunication) / http://id.loc.gov/authorities/subjects/sh94007902...”

11 Subjects: “...Photography / Digital techniques / http://id.loc.gov/authorities/subjects/sh90001789...”

12 Subjects: “...Electronics / Amateurs' manuals / http://id.loc.gov/authorities/subjects/sh85042384...”

13 Subjects: “...Electronics / Amateurs' manuals / http://id.loc.gov/authorities/subjects/sh85042384...”

14 Subjects: “...iPhone (Smartphone) / http://id.loc.gov/authorities/subjects/sh2007007371...”

15 Subjects: “...iPhone (Smartphone) / http://id.loc.gov/authorities/subjects/sh2007007371...”

16 Subjects: “...Photography / Digital techniques / http://id.loc.gov/authorities/subjects/sh90001789...”

17 Subjects: “...Electronic circuit design / http://id.loc.gov/authorities/subjects/sh85042276...”

18 Subjects: “...iPhone (Smartphone) / http://id.loc.gov/authorities/subjects/sh2007007371...”

19 Subjects: “...Social media / http://id.loc.gov/authorities/subjects/sh2006007023...”

20 Subjects: “...Prototypes, Engineering / http://id.loc.gov/authorities/subjects/sh85107813...”