OAKLAND, CALIFORNIA: Apple and IBM are announcing the first fruits of a partnership aimed at developing new mobile software — and selling more mobile devices — to business customers. One new app, developed jointly by the erstwhile rivals promises to help telecom service workers find their way to customer appointments in the field more quickly, using the GPS on an iPhone or iPad. Another would let flight attendants help passengers change their connecting reservations in mid-air. All told, IBM and Apple announced 10 new business-oriented programs. The two tech giants have a history of rivalry, but Apple and IBM announced a partnership over the summer to create a series of businessfocused apps that combine IBM’s data analytics prowess and knowledge of business requirements with Apple’s skill at creating elegant, user-friendly products.