For each of the following areas of web technology, identify some of the key changes which have occurred during the lifetime of the web, and explain

For each of the following areas of web technology, identify some of the key changes which have occurred during the lifetime of the web, and explain the impact these changes have had for the work of web developers in constructing web sites and ensuring that they meet user needs.

(a) Web access devices and browsers

(b) Mark-up languages

(c) Data communication capabilities