The Modern Keyboard For Personal Computers Has Been Developed From A Similar One Used In Typewriters. The Layout Has Remained The Same, But The Computer Keyboard Uses The Making And Breaking Of An Electrical Contact To Detect The Key-press. The Major Disadvantage Of This Concept Is That A Large Amount Of Physical Space Is Needed To Accommodate The Keyboard, Making It Unsuitable For Applications Such As Mobile Phones Where It Placed Limitations On The Screen Size. To Overcome This Drawback, The Touchscreens Were Developed, Which Integrated The Input Mechanism In The Screen Itself. However, Typing On Touchscreens Is Inconvenient For Most Users, Due To The Small Size Of Buttons. Also, As The Touchscreen Typing Keypads Are Integrated In The Computer Software, There Are Some Security Issues.
