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[[WordStar]] for word processing, [[Multiplan]] for editing spreadsheets, [[dBASE]] for developing databases as well as more than 13 high level languages for making customized applications were typical personal business applications that were running in CPC under CP/M-80. However, a CP/M-80 application dealing with the personal or the family budget was missing. <br> '''COSMOS''' is a personal COSt MOnitoring System written by [[KSL|KSL]] which runs under CP/M-80. COSMOS was initially released in 2006, whereas the latest version (v.26) was released in winter 2020.<br><br>COSMOS It is a personal business application similar to the MSDOS-era PC applications and one of the most recent projects developed for CP/M-80. COSMOS runs under [[CP/M|CP/M 2.2]] (the Dobbertin 63 KB TPA version) and is built upon the mouse based graphics user interface as pioneered by Xerox at Palo Alto and popularized by Apple with the Lisa and Macintosh computers. <br><br> COSMOS can be used to edit the daily income, plan the monthly expenses and perform trial and error analyses in order to maximize the annual profit. A full annual project of COSMOS, including the user attachments, the user block of invoices, the summary files as well as the user agenda notices can hardly reside/run on a standard CPC6128 as it requires minimum 350 KB of disc space. In order to process and store the aforementioned data, COSMOS makes full use of the CP/M memory resources and CPC's peripherals. Thus, an supports any external high capacity drive (360-up to 800 KB), some the [[Dobbertin RAM expansion ]] (256-up to 512 KB), a the [[Dobbertin hard disk ]] (20 MB HD), a the serial RS232C interface, a any dot matrix printer, a the CTM color monitor (for the 16-color screen saver) and an the [[AMX Mouse]] are fully suggested. Notice that the latter configuration resembles to a well equipped 8086/8088 PC computer. <br><br>  

By using the setup installation utility of COSMOS the user can initialize any annual project or start a temporary or a demo project in order to become familiar with the COSMOS user interface and functions. As far as the controls are concerned, Cursor keys or Mouse can be used in order to control the pointer. [F0] key simulates the left button of the mouse, whereas [F.] key simulates the right button of the mouse. Left button can be used for (Yes), whereas the right button can be used for (No),(Next) or (On-Board) help. ESC key can be used to escape.