Hi On Question 2, I'd say it really depends on who you are writing to If you are writing to a company that specialises in UX design, I think the abbreviation will work well If you were writing to an organisation that is not so familiar with that terminology, it is better to say it in full - I worked on the project to improve user experience on the phablet product Dave
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.