If you have a business servicing courier parcel, there is a big chance that you have a website too. For the non-technical, they hire someone to make the website for them but it does not mean that they should not know what the most commonly used file types as well as file extensions used. It is also a good starting point if you want to learn the basic of web scripting and design.
The most common type of files employed by web servers are web pages, images, scripts and programs. For a standard type of web page, only two extensions are utilized – .html and .htm. At the end of the day, these two extensions are almost the same because you can use them on majority of web servers.
Html is the original version used on HTML web pages for machines that are hosting Unix. It points to any file that has a format that is HTML. HTM, on the other hand, was developed by Windows because the operating system requires that the file extensions should only have three characters. It also refers to HTML files and the format can be used in various web servers with different operating systems.
The default page on majority of the web servers’ directory is called index.html or index.htm. This is included in the address of the first page if you want a user to go to your website’s page without having to enter the entire file name. Thus you should put your web address as http://courierparcel.com/index.htm and when the user enters http://courierparcel.com/ they will land on the same page.
In terms of images, the most common types are .gif, .png and .jpg. GIF is mostly used with images containing flat colours and popular with animated image. PNG is the better version of GIF while JPG is recommended for photographic qualities.
For scripts, the most commonly seen on websites are .cgi, .pl, .js, .java and .class. Most probably, your web developer has used these file extensions in creating a website for courier parcel service but you are not aware since you are presented with the executed site rather than the code.