Even if you haven't heard the phrase 'software as a service' (SAAS), the chances are you've already used some of it. Online banking is one example of SAAS. Many popular web-based email services are another. These are the most pervasive and widespread examples of software as a service, and they give you an idea of just how powerful an idea it is. And what scope it offers for the future. If global banking companies can use SAAS to deliver secure banking services to millions of customers over the web, what could SAAS do for your small or medium sized company? The concept of SAAS is simple. Software that a few years ago might have been purchased and manually installed on every computer in the business is replaced by a web-based service. Data is stored securely on remote servers. The user interface is a web site, and can be accessed from almost any computer on earth. Instead of buying a copy of the software, you buy the right to use it, usually for a year at a time. Chris Lindsay, BT's General Manager of Business Applications, says SAAS is already more popular than most people think - mainly because it's hidden from view. 'Lots of people are using it but they don't think about what it is, or how it works. But they use online banking and they trust it.' Why is this important now? Because several factors have converged to make it cost-effective and convenient. Broadband is available in all but the most remote locations; wifi is widespread; computers are cheaper and more lightweight than ever; and the only software they need to make use of SAAS, the browser, is now an advanced product with many years of development behind it. In short, the conditions have come about that make Saas not only a commercial reality, but a sensible choice. SAAS makes life easier in many ways. It reduces the need for in-house IT specialists. It might reduce software costs overall. It allows staff to work from almost anywhere, using any computer. All they need is the browser and the connection. Huge cost and time savings can be made, and massive improvements in business efficiency. SAAS can also be a low-cost solution. Google's Apps for Your Domain costs just '25 per user per year. This includes 25GB of storage space, guaranteed uptime, a suite of web-based office tools, and much more. Some of the web's best-known innovators are enthusiastic supporters of SAAS. Evan Williams, who sold his Blogger.com startup to Google and went on to create new businesses at Odeo and Twitter, wrote his list of webapps for running a business on, commenting: 'The improved efficiency of having these apps available, and not having to install and maintain servers for them is huge.' And Matt Haughey, founder of online community site Metafilter, expressed similar sentiments: 'Pretty much anything having to do with my business and personal life is online and easily retrievable. I barely use my operating system's taskbar/dock ' my bookmark toolbar launches every app I need.' One big concern for anyone choosing SAAS is security. Most business data must be kept secure, and the thought of putting it on the web can be very off-putting. Chris Lindsay says that's a natural first reaction, but not something that should prevent you using SAAS. 'Traditionally, people think that if they can see their data, if they can touch their server in the corner of the office, that means it's all secure. But that's not what it's about. 'Web-based solutions are designed to be secure. Millions have been invested in making sure they can look after data properly. Huge multinationals are using services like this because they can see the benefits they bring. 'Ultimately, many SAAS offerings will be more secure than anything your small business might try to do in-house. The data is backed up and fully encrypted. You don't have to worry about managing it any more, you can just use it and get on with doing your work.' It all boils down to trust. You might trust your existing IT set-up, and might feel it offers everything you need because it was created in-house by your own IT team, but could moving everything to the web make your business more efficient? Do you trust the web to work as well as your in-house system? Turn the question around: do you trust an in-house IT service to be completely secure? And just because you can see software installed on the computer that sits on your desk, is it the best choice of software for an increasingly mobile workforce? What SAAS offers is freedom from IT lock-in, and freedom from traditional office-based business. If all you need is a browser - and browsers are everywhere - then an opportunity opens up to spend more time dealing with customers, and meeting them in their offices, rather than being cooped up in yours. BOX OUT The travel experts at environmental travel specialists WOX (Way Out Experiences) used to manage complicated travel plans for clients using a system of spreadsheets that was, to put it mildly, clumsy. Julie Ion, Client Relationships Manager, explains how bad it used to be: 'We used to store everything in spreadsheets. I'd have one in the UK, and our field agents in places like Malaysia would have theirs. Each would run on different software: whatever I sent to them, they had to input on to their spreadsheet manually. It was a nightmare.' WOX started using the NetSuite CRM tool and saw immediate improvements. Now, there are a single set of management tools on the web. Any member of the WOX team can view or edit the data from anywhere in the world. The complex paperwork required for every traveller is also stored online; before, there were 10 pages of forms that had to be filled in, photocopied, and faxed. And were frequently lost. Julie says: 'We gone from being paper-hungry to rarely using any paper. NetSuite has revolutionised the way we work, and made us much more efficient. Everything is totally secure and we can get to it form anywhere. It's wonderful.'