The "bump dots" on the keys, installed in this case by the organization using the keyboards, help the user find the right keys in a tactile way.
ðə "bˈʌmp dˈɑːts" ɔnðə kˈiːz, ɪnstˈɔːld ɪn ðɪs kˈeɪs baɪ ðɪ ˌɔːɹɡɐnᵻzˈeɪʃən jˈuːzɪŋ ðə kˈiːboːɹdz, hˈɛlp ðə jˈuːzɚ fˈaɪnd ðə ɹˈaɪt kˈiːz ɪn ɐ tˈæktaɪl wˈeɪ.