Since Marc Andreessen developed the first web browser "Mosaic" a large number of different browsers and versions followed.
Well known browser are f.e. 'Internet Explorer', 'Mozilla Firefox', 'Netscape', 'Opera', 'Safari', 'Google Chrome', 'Android Browser' und 'Mobile Safari'.
Mobile Internet usage has been skyrocketing over the last few years and therefore websites have to be mobile friendly.
Lately you read very often about "responsive design" - a technic where webdesigns entirely respond based on the user’s screen resolution (PC, Smartphone, ...).
We happily advise you for which platform and browser version your web application should be optimised and guarantee compatibility.