Technology: general issues 79 3D printing 54 History of engineering and technology 54 3D printers 26 Research & information: general 25 3-D printing 21 History of engineering & technology 19 TK Electrical engineering. Electronics Nuclear engineering 19 additive manufacturing 18 3D-printing 17 human 17 Humans 16 Additive manufacturing 14 Additives 12 TJ Mechanical engineering and machinery 12 Chemistry 10 Deposition 10 History 10 Research and information: general 10 adult 10 Biology, life sciences 9 TP Chemical technology 9 female 9 three dimensional printing 9 Article 8 Materials science 8 Media studies 8 Physics 8 Printing, Three-Dimensional 8 male 8