Rare Lot of 5 Original Casio FP-6000S Computer & Microsoft MS-DOS Manuals This lot is a significant find for collectors of vintage computing memorabilia and early 1980s technology. Included are five original software and user manuals specifically issued for the proprietary Casio FP-6000S 16-bit personal computer system. These manuals represent a complete set of documentation required to operate and program this rare computer, which was also a core component of Casio's high-end "Cosmo Synthesizer" music workstation. The striking blue and yellow covers are iconic of early PC documentation. This Lot Includes the Following Guides: FP-6000S 16-Bit Personal Computer C-BASIC User's Guide: The main programming guide for the system's built-in BASIC language interpreter. Microsoft MS-DOS Operating System (I. Casio Notes & II. User's Guide): Essential documentation for the proprietary version of Microsoft's dominant operating system running on the Casio hardware. Microsoft MS-DOS Operating System (III. Programmer's Reference Manual): A deep dive into system-level programming and calls for developers. Microsoft Macro Assembler Package (IV. MASM, MS-LINK, MS-LIB, MS-CREF, DEBUG): High-level technical documentation for assembly language programming tools, a particularly valuable inclusion for technical collectors. Condition: Manuals are in excellent, lightly used condition with clean pages, Minor shelf wear on covers, No writing or highlights detected This collection is perfect for a museum exhibit, a retro computer enthusiast seeking complete documentation for their FP-6000S system, or anyone fascinated by the history of the personal computer and Microsoft software in the 1980s.