There are many applications that address users with assistive technology needs – whilst it may depend on the size of business it should never be underestimated.
How can it be overcome? As I get more involved and understand the topic more I will be updating this article. But essentially it is important to maintain equality throughout.
One of the most common and widely used pieces of software is Dragon Naturally Speaking. Nuance (the vendor) has a number of user based tasks on their support pages demonstrating how to migrate settings from legacy versions. The important issue with Dragon NS though is that if you have let your installed version(s) get a long way behind then you may need to have a two stage migration process.
Remember each and every user has a unique set of requirements and you try not to differentiate between users.