In color theory, a purple is defined as any non-spectral color between violet and red (excluding violet and red themselves). The spectral colors violet and indigo are not purples according to color theory, but they are purples according to common English usage since they are between red and blue.
Apex Learning was started in 1997 by Microsoft co-founder Paul Allen on the idea that online courses and test prep, which were already succeeding in higher education, could be applied to K-12.
One of SAP's competitors is Salesforce.com, a business solutions cloud computing company. The company's CEO in 2006, Mark Benioff, criticized SAP for both failing to use its own technology and not being innovative.AP was founded in Germany in 1972 by three former IBM employees. The company was located in Walldorf, Germany as of 2011 and develops a number of mobile, desktop and cloud computing business software programs.