Updating with WordPress backend
The general content of the SPIN site is managed by the CMS WordPress which allows you to publish information in the form of Pages and Posts. Using the WordPress backend you can add and change content of any page or post. Access to the backend requires a username and password and you find the login form by adding /wp-admin to the the SPIN URL address.
WordPress is a very widely used CMS for web publishing and you can find numerous guides on how to use the backend on the web, including Youtube videos. You can download the SPIN guide to the WordPress backend here.
Updating with Microsoft Word
The general content of the SPIN site is managed by the CMS WordPress which allows you to publish information in the form of Pages and Posts. Your Posts (but not Pages) can be very easily published just by using Microsoft Word and the build in function for publishing directely to a WordPress site. The setup for this is a one time only activity (download guide here) and it requires a username and password to the system. Following the setup you can publish articles to any of the defined categories on the site. For now only the category News is part of the general content, but more could be added.