I have been asked how to load programs in the HP Prime - apart from keying them in. in short steps:
Download the HP connectivity kit (and HP Prime app, now that we're in business) from the HP.com site: HP Connectivity kit download
Install it in your computer. Be sure that you select the right version of your operating system. In my case it defaulted to Mac OS 10.1 - I changed it to the right MacOS version
Open it and connect your calculator to it. This connectivity kit also serves to update the calculator firmware, if it is not updated.
Go to hpcalc.org, and navigate to the HP Prime programs that you want - there are many!
Choose the area and choose the program you want to download:
Click on "details" and on the file name:
Unzip the file in your computer
Read the .txt or the .pdf files - it is good practice!
Open the HP Prime. You will see applications and programs - it depends what you have downloaded
if the directory has the .hpappdir, drag it to the applications folder
if it is a program, drag it to the programs folder: