The text details various computer input and output devices, including keyboards, mice, speech recognition, scanners, and various card readers.  Output devices covered are display screens (LCD, LED, OLED, Plasma), printers (laser and inkjet), plotters, and 3D printers, including bioprinting.  Storage and playback devices like digital audio players and e-book readers are also mentioned.  Finally, the text classifies computer systems (general-purpose, special-purpose, single-user, multiple-user),  discusses portable computers (smartphones, notebooks, ultrabooks, tablets), and concludes with an overview of data centers and factors driving their growth.