This study investigates an interesting university-industry (UI) collaboration pattern related to the so-called crossover papers. Crossover papers involve at least an author, referred to as crossover author, whose multiple affiliations include at least a university and at least an enterprise simultaneously. The presence of crossover papers and crossover authors suggests more intensive interaction between universities and enterprises. This study, therefore, observes the trends and patterns of crossover papers and crossover authors. This study also investigates the crossover papers that are also cross-country based on the nationalities of the affiliated universities and the enterprises. This study also takes a microscopic view into those universities and enterprises that are more frequently involved in crossover papers. This study reports the result using papers from the field of Computer Science during the period 2002-2011, which will be used as a comparison base for the subsequent investigation that covers more recent years. The result shows that crossover papers and crossover authors are not yet a common phenomenon during this early period. The crossover papers are usually produced by at least a crossover author working with one or more other authors. The crossover authors, however, are more often not the first or corresponding authors of these crossover papers. For a university and an enterprise collaborating in a crossover paper, they may very likely breed one crossover author in another paper, suggesting crossover papers indeed reflect a stronger relationship between universities and enterprises involved. The result further shows that most crossover papers are produced domestically, suggesting that locality or proximity is a key factor for crossover relationship. The USA is the obvious leader in crossover papers and cross-country papers. However, USA’s crossover papers involve few universities and enterprises from other countries but, for overseas crossover authors, their crossover papers often have affiliations with USA universities or enterprises. Both universities and enterprises are rather diverse in having crossover relationship with other institutions. The enterprises, nevertheless, do have a higher average number of crossover relationships than that of the universities.