Web Invoice - Version 9.1 Software that has been designed from the ground up** Web Invoice is a WEB BASED Applicaton written in PHP, which means, it is 100% portable and can be installed onto any web server supporting PHP 4 or 5 and MYSQL 4 or 5.** No matter if the server is Based on Windows or Linux, It will function and perform 100%.** Web Invoice is also designed to run on a normal Windows PC.You have the option to download the Windows version and be up and running within a minute.This is possible because it comes bundled and preconfigured with Windows Based Apache, PHP & MySQL Servers.Some advanced features include:*Web Based: Being web Based ensures easy access to the central Database from where ever you are.