Numbers
- 2-byte character
Don’t use; use double-byte character.
- 2D
Abbreviation for two-dimensional. No hyphen in the abbreviation. For guidelines about spelling out abbreviations, see abbreviations and acronyms.
- 2K, 4K, 5K, 6K, 8K (adj.)
Horizontal screen resolution or image resolution measured in thousands of pixels. Don’t use a space between the numeral and the K.
The 27-inch iMac has a Retina 5K display.
Apple ProRes codecs support all standard frame sizes (including SD, HD, 2K, and 4K).
- 3D
Abbreviation for three-dimensional. No hyphen in the abbreviation. For guidelines about spelling out abbreviations, see abbreviations and acronyms.
- 3D Touch
A technology used in some older iPhone models that lets users access additional features by pressing the display. Newer models use Haptic Touch. See also Force Touch; Haptic Touch; press.
- 10Base-T, 100Base-T, 1000Base-T
Note capitalization. See also Ethernet; Fast Ethernet (100Base-T); Gigabit Ethernet (1000Base-T).
- 24/7
Not 24x7. To spell out, use the form 24 hours a day, 7 days a week; a 24-hour-a-day, 7-day-a-week support program.