Computer systems are a vital part of almost every modern business, but the extent to which those systems are properly maintained varies widely between companies. Only a large business can afford to maintain its own dedicated IT department, which often leaves smaller businesses dependent on their own internal resources.
The problems with 'going it alone'
Most people who use computers for work don't have great technical knowledge. They know how to turn on the computer and which buttons to press to complete whatever their particular job may be.