The way that you read music has changed over the years. There are still plenty of gigs where you will be reading physical, paper charts but since the introduction of apps such as ForScore, many musicians are using their iPads ...
I use some of this stuff only in the studio and some come with me to every gig. There are some lifesavers in there that may be useful for you to consider...Feel free to comment with your essential recommendations! Markbass Bass ...