• Support for iPhone Duo: the calculator uses the full display when the phone is open and keeps clear of the camera cut-out, so no key is hidden. • The display shows an annunciator only while it is on, as on the real calculator; nothing is ghosted when the calculator is off.

Program files • Import Program… and Export Program… – a document icon on the bezel, between Settings and the handbook (File menu on the Mac). Save the program in memory to a file, share it, and load it again later. • Files are plain-text listings with the keycodes the calculator shows in Program mode, so they can be read and typed in any text editor. • A file can carry a title, the author, notes, and the modes the program was written for: BEGIN or END, D.MY or M.DY, the C setting and the number of decimal places. Import shows everything in a preview first and can set the modes for you. • A new Program Files chapter in the handbook describes the file format. Handbook • Find in the handbook: ⌘F on the Mac, the magnifier in the toolbar on iPhone and iPad.

• Every display readout in the Owner's Manual is now drawn as the calculator shows it, and the manual can be searched (tap the magnifier, or press ⌘F on an iPad keyboard). • Fast typing no longer loses keys. Each keystroke is handed to the calculator the moment it is ready for it, exactly as the original keyboard did. • Holding a key behaves as on the real machine: SST and BST scroll through program lines at the original pace, even with Real Speed off. • The Real Speed switch in Settings now does what it says. Off, the calculator runs about forty times faster than the original.