scientist has done a good work in bringing these 'digita monster' or rather the latest technology of our time called computer. More to their elbow. Having been working through my computer as an engineer i find it dificult using the keys in the night; unless you have to put on the ligth and/ or rather focus it on the keyboard. Even if you are like the  populer mavis beacon who might type with eye close, there must still be need to open the dam eye and peep. Having gone through all these coupled with my research on the on the dificulties faced by the user and the posibility of it, i now, putting it as a suggesion that computer keyboard should be builded with diods light especialy portable ones like laptop, notebook, palmtop, among others. If am oportune, i have a lot to contribute as i have always wanted to be a scientist.