Yesterday, Apple filed suit against Samsung over their "Galaxy" line of Android-based smartphones and tablets. In a statement, Apple claimed that Samsung copied Apple's technology and user interfaces:
"Rather than innovate and develop its own technology and a unique Samsung style for its smartphone products and computer tablets, Samsung chose to copy Apple's technology, user interface and innovative style in these infringing products," the Journal quoted Apple's complaint as saying.
As many have noted, Apple also happens to be one of Samsung's biggest customers. Apple uses Samsung displays and semiconductors extensively in their iOS devices. Even so, Samsung says they will respond "strongly":
"Apple is one of our key buyers of semiconductors and display panels. However, we have no choice but respond strongly this time," an unidentified official was quoted as saying.
According to the Yahoo news article, Apple was Samsung's second-largest client in 2010 after Sony Corp and was responsible for 4% of Samsung's $142 billion in revenue last year.