Index_O

O

Observation, user, 101–102

Office applications, 29

Ohno, Taiichi, 231, 242

One-hand use, 144

One-line layouts, 54

One-row keyboard, 157–168

dedicated keys on, 161–162

first evaluations of, 163–165

first prototype for, 162

lessons learned from, 166–168

origin of concept, 157–160

potential benefits of, 160–161

preliminary usability testing for, 151

second evaluations of, 165–166

second prototype for, 164–165

typing with, 163–166

One-softkey style, 70

(See also Navi-key)

Open Mobile Alliance, 283–284

Opportunistic actions, 239–240

Option lists, 54–55

Orientation applications, 107–108