add a blob of new manuals

README.md

@@ -221,6 +221,7 @@ Sorted alphabetically by company name and product name.
 - [Apple Color Plotter User's Manual](https://archive.org/details/AppleColorPlotter)
 - [Atari 1020 Color Printer Owner's Guide (1982)](https://archive.org/details/atari-1020-color-printer)
 - [Atari 1020 Color Printer Field Service Manual (1983)](https://archive.org/details/atari1020colorprinterfieldservicemanualrev.011983atari)
+- [CalComp Artisan Plus 1023/1025/1026 User's Guide (1990)](https://archive.org/details/calcomp-artisan-plus-1023-1025-1026-users-guide)
 - [Programming CalComp Pen Plotters (1968)](https://archive.org/details/bitsavers_calcompProlottersJun68_2464236)
 - [Commodore 1520 Printer Plotter Manual (1983)](https://archive.org/details/1520PrinterPlotterUsersManualStyleA)
 - [Commodore 1520 Printer Plotter Manual](https://archive.org/details/1520PrinterPlotterusersManualStyleB)
@@ -232,20 +233,25 @@ Sorted alphabetically by company name and product name.
 - [Fluke 1771A Intelligent Digital Plotter User's Manual (1983)](https://archive.org/details/manualsplus_03096)
 - [Gerber GS750 Plus User Manual (1995) (manualslib)](https://www.manualslib.com/manual/465193/Gerber-Gs750-Plus.html)
 - [Gerber Signmaker IVB User's Manual (1983) (manualslib)](https://www.manualslib.com/manual/464167/Gerber-Signmaker-Ivb.html)
+- [Graphtec Pen Plotter MP303 Series Service Manual (2004)](https://archive.org/details/manualzilla-id-5807113)
 - [Houston Instrument DMP-160 Plotter Operation Manual](https://archive.org/details/houston-instrument-dmp-160-series-plotters-operation-manual)
 - [Houston Instrument DM/PL Command Language (1984)](https://archive.org/details/hi-dmpl-command-language)
 - [Houston Instrument DMP-40V Operation Manual (1988)](https://archive.org/details/dmp-40v)
 - [Houston Instrument HIPLOT DMP-51/52 Operation Manual (1985)](https://archive.org/details/hi-dmp-51-52-operation-manual)
 - [Houston Instrument Interface Notes for DM/PL Intelligent Plotters (1983)](https://archive.org/details/hi-interface-notes-dm-pl-plotters)
 - [Houston Instrument Stand Assembly Procedure DMP-50 Series Plotter](https://archive.org/details/hi-stand-assembly-procedure-dmp-50-series-plotter)
+- [Houston Instrument DMP-60 Series Plotters Operation Manual (1990)](https://archive.org/details/houston-instruments-dmp-60-manual)
 - [HP 7470A Interconnection Guide](https://archive.org/details/manualzilla-id-7029812)
 - [HP 7470A Operator's Manual (manualslib)](https://www.manualslib.com/manual/1089592/Hp-7470a.html)
 - [HP 7475A Graphics Plotter Operation and Interconnection Manual](https://archive.org/details/HP7475AOperationManual)
 - [HP 7570A DraftPro Plotter Hardware Support Manual](https://archive.org/details/7570adraftproplotterhardwaresupportmanual0757090000201pagesdec86)
+- [HP 7580B Drafting Plotter Service Manual (1986)](https://archive.org/details/hp-7580-b-plotter-service-manual)
 - [HP 7585B Drafting Plotter Service Manual (1983)](https://archive.org/details/bitsavers_hpplotter0_18190273)
 - [HP DraftPro Plotter User's Guide (1986)](https://archive.org/details/draftproplotterusersguide0757090017163pagesmay86)
 - [HP DraftPro Plotter Programmers Reference (1986)](https://archive.org/details/draftproprogrammersreference0757090001387pagessep86)
+- [Mutoh ET202 Scriber (German)](https://archive.org/details/mutoh-et202-leichtgemacht)
 - [Olivetti PL10 Microplotter User Guide (1983)](https://archive.org/details/olivettipl10microplotter)
+- [Olivetti P6060 Programming Manual (1979) (Italian)](https://archive.org/details/olivettip6060prestazionigrafiche)
 - [Philips X-Y Flat Bed Recorder PM 8120 (1971)](https://archive.org/details/manualsplus_03520)
 - [Radio Shack TRS-80 Plotter Printer Manual](https://archive.org/details/Plotter_Printer_19xx_Radio_Shack)
 - [Radio Shack TRS-80 Color Graphic Printer Operation Manual](https://archive.org/details/cgp-115_operation_manual)
@@ -260,13 +266,17 @@ Sorted alphabetically by company name and product name.
 - [Roland DPX-3300 Service Notes (1987)](https://archive.org/details/dpx-3300-service-manual)
 - [Roland DPX-3300 Schematics (1987)](https://archive.org/details/dpx-3300-schematics)
 - [Roland DPX-3700A DPX-2700A User's Manual (Roland Direct Download)](https://downloadcenter.rolanddg.com/contents/manuals/DPX-3700A+2700A_USE_E_R8.pdf)
+- [Roland XY Plotter DXY-1350A DXY-1150A User's Manual (1997)](https://archive.org/details/manualzilla-id-5691908)
 - [Rotring Tubular Plotter Points Practical Tips and Information](https://archive.org/details/rotingtubularplotterpointprakticaltipsandinformation)
 - [Rotring NC-scriber CS 50 Operating Instructions (1989)](https://archive.org/details/rotring_NC-scriber_CS_50_Operating_Instructions)
+- [SEGA SP-400 Operation Manual](https://archive.org/details/sega-sp-400) – This doesn't present as a flippable book on the archive, but the original page scans are still available for download.
+- [Sekonic SPL-450+/SPL-455 User Manual (1990) (German)](https://archive.org/details/sekonicspl450spl455)
 - [Siemens C1613 Plotter Manual (German)](https://archive.org/details/SiemensC1613Manual)
 - [Silver Reed Colour PenGraph EB-50 Operating Manual (1984)](https://archive.org/details/silver-reed-colour-pengraph-eb-50-operating-manual)
 - [Taxan X-Y Plotter KPL 710 Instruction Manual](https://pzwiki.wdka.nl/mediadesign/File:Taxan_kpl710_x-y_plotter.pdf)
 - [Tectronix HC100 Instruction Manual (1987)](https://archive.org/details/manualsonline-id-212d14c3-7d2f-4e64-906f-1a22e86d1f35/)
 - [Panasonic RK-P400C 4-Color Graphic Penwriter Manual](https://archive.org/details/panasonic-rk-p-400-c-manual)
+- [Panasonic Penwriter Manual Excerpt: RS232 Protocol Section](https://archive.org/details/panasonicpenwriterprotocol)
 - [[Unknown Brand] LP 2002 Photo Plotter Attachment Operating Manual (German)](https://archive.org/details/lp-2002-betriebsanleitung/) - Also see [Martin Bircher's thread](https://mastodon.social/@artandtech/109382879937442706) with pictures of this device.
 
 ### Ephemera