Manager. In 2003 and 2005, CASIO released respectively their first and second product: the ClassPad 300 with 4.5 MB of flash memory, and the ClassPad 300 Plus with 5.4 MB of flash memory and other improvements. ClassPad OS 3.0 In 2006 CASIO released OS 3.0 for the ClassPad. OS 3.0 featured Laplace and Fourier transform, differential equation graphs, financial functions, AP statistics and parameterized 3D graphs. Subsequent releases were only available for users with OS 3.0 or later. Later in 2006 & 2007 CASIO released OS 3.01 and 3.02, concentrating solely on bug fixing. The 2007 ClassPad was called the 330 series, but was distinguished from the 300 plus only by its having OS 3.02 pre-installed. In 2008 CASIO released OS 3.03 for the ClassPad. OS 3.03 featured new probability distribution functions, an extended numeric solver and several user interface improvements. The corresponding hardware with this OS installed was the 330-A series In 2009 CASIO released OS 3.04 for the ClassPad. OS 3.04 featured an updated spreadsheet application, stat function enhancements and several user interface improvements. Also, there were two hotfix releases for OS 3.04.3000 - namely: OS 3.04.4000 and OS 3.04.5000 In 2010 CASIO released OS 3.05 for the ClassPad. OS 3.05 featured new financial functions and an 'on data' option for quartile calculation. In 2011 CASIO released OS 3.06 for the ClassPad. OS 3.06 featured new imaginary calculation functions and an improved numeric solver. So far, one hotfix release followed: OS 3.06.1000 In 2012 CASIO released the ClassPad 330 Plus featuring a faster CPU (SuperH 4) and the calculator is now treated as a regular USB mass storage device. In December 2018 Casio released 3.10.7000 for the ClassPad 330 Plus. Adding improvements in calculation precision. fx-CP400 The fx-CP400, released in 2013, has a colour screen also capable of switching the screen between portrait and landscape views. The resolution was also improved, to 320 × 528 pixels. The CPU is a SuperH 4 of the SH-7305 model. It contains a 2MB RAM chip, but only 512KB are available to the user. It includes 24 MB of flash storage, and 5.5 MB for eActivity. On this calculator, integers can be stored up to 22032, which is 611 digits long. After that, scientific notation is used to represent numbers up to 101000. fx-CG500 The Casio fx-CG500 was introduced in 2017, and is almost identical to the fx-CP400. The most significant difference