Facebook and microblogging platforms like Twitter gained in popularity. Smartboards in schools gained acceptance and were adopted rapidly during the middle years of the decade. E-book readers using electronic paper technology were developed, and enjoyed modest popularity. Software development The Agile Manifesto was launched and agile project management approaches such as Scrum grew in popularity. However, due to factors such as inflexibility in procurement processes, and lack of expertise among civil servants, government computing projects continued to fail with regularity, notably in the United Kingdom. A large number of software development and software testing jobs in rich nations were offshored to less wealthy countries such as India and Russia, mirroring a globalisation trend that had already occurred in physical manufacturing. There was also a trend of offshoring software development work to cities like Dubai and Singapore - where Western developers rubbed shoulders with other foreign workers - and "offshoring" within the EU (including nearshoring). Video Digital cameras became very popular due to rapid decreases in size and cost while photo resolution steadily increased. As a result, sales of film reel cameras diminished greatly, and integration into mobile phones increased greatly; sexting by teenagers also became a controversial social issue, with teenagers - and even in one case a school administrator who investigated a sexting case - being arrested. Graphics processing units (GPUs) and video cards became powerful enough to render ultra-high-resolution (e.g. 2560 × 1600) scenes in real time with substantial detail and texture. Flat panel displays began displacing cathode ray tubes. This was a dramatic change during the decade, as very few flat panels were sold through the mid-2000s (decade) and the majority of stores sell only flat panel TVs by the end of the decade. Handheld projectors entered the market and were then integrated into cellphones. The digital switchover started to be enforced for television. The introduction of digital video recorders (DVRs) allowed consumers to modify content they watch on TV, and to record TV programs and watch them later, leading to problems as consumers could fast-forward through commercials, making them useless, and save TV shows for later viewing, causing a decline in live TV viewing. However, these problems were already present with video tapes. Internet usage surpassed TV viewing in 2004. Satellite TV and cable TV (with the exception of digital cable) lost ratings as network television ratings gradually increased. TV networks started streaming shows online. There