Related by context. All words. (Click for frequent words.) 76 UltraCamXp Wide Angle 70 UltraCamLp 70 UltraCam 67 ADS# [001] 64 HD1a 64 GigE Vision compliant 64 FinePix S#FS 64 Ricoh #SE 64 Nikon D# DSLR [001] 64 EOS #Da 64 mega pixel sensor 63 SRTM 63 #/#.#-inch CCD [001] 63 NIS Elements 63 spectroradiometers 63 Multi Sensor 63 Aerodata 63 Vexcel Imaging 63 Leica HDS# 63 Multispectral 63 Vexcel 63 orthophoto 63 Nikon D2X 63 georeferenced 63 hyper spectral 62 LZ5 62 orthorectified 62 LEICA M8 62 #mm f/#.#G ED 62 Synthetic Aperture 62 KnowledgeLake Capture 62 3MOS 62 airborne LIDAR 62 oblique aerial 62 GY HD# 62 3D LUTs 62 TerraSAR X 62 Gigapixel 61 Fastcam 61 FinePix S#fd 61 FinePix S#EXR 61 electro optical EO 61 ortho rectified 61 multispectral imagery 61 Digital Camera Introduction 61 Nikon D3X 61 Pentax #D 61 Landsat imagery 61 Warsash Scientific 61 Exmor CMOS sensor 61 aspheric lens 61 hyperspectral imager 61 HPX# [001] 61 Digital Camera Announced 61 Interferometric 61 Digital Elevation Models 61 Intermap NEXTMap 61 Applanix 61 resolution panchromatic 61 COOLPIX S#c [002] 61 SpeedGrade 61 Super HAD CCD 61 SLR styled 61 SIRAL 61 CalMAN 61 Z1U 61 HP Scanjet G# 61 DMC L# 61 MG4 61 #x magnification [001] 61 Techwell TW# 61 DMR BR# 60 LaserSoft Imaging 60 XMap GIS Editor 60 FluxData 60 Canon imagePROGRAF 60 multiformat HD 60 CCD imager 60 BU #H 60 EOS Rebel XS 60 Samsung ST# [001] 60 ONVIF compliant 60 orthophoto production 60 Graphtec 60 Interferometric Synthetic Aperture Radar 60 GY HD#U 60 AXIS P# [002] 60 TracePro 60 DMC FH# 60 digital rangefinder 60 DigitalGlobe ImageLibrary 60 airborne LiDAR 60 Telestream Pipeline 60 S Nikkor #mm 60 Nikon D3S 60 LADAR 60 ScanStation 60 microphone preamplifier 60 COOLPIX L# [001] 60 Kodak V# 60 EO IR sensor 60 ortho imagery 60 Mission SRTM 60 ProHD 60 FARO Scene 60 VTour 60 SDR S# [001] 60 MTS# 60 LEICA D 60 widefield 60 ClearVid CMOS sensor 60 GeoSAR 60 mm f/#.# ASPH 60 iU# 60 KODAK Scanners 60 laser triangulation 60 D2Hs 60 Nikon AF 60 Sony HVR 60 Sigma SD# 60 Fujifilm FinePix F# [002] 60 4x optical 60 LiDAR 60 Hasselblad H3D 60 mosaicking 60 FARO Laser Scanner 60 REALVIZ 60 Canon ScanFront 60 Synthetic Aperture Radar SAR 60 CLIPSTER 60 remote sensing imagery 60 GTViewer 59 Canon EOS Digital SLR 59 #/#-inch CCD 59 telecentric 59 #.#cm LCD 59 DMC ZS7 59 Trimble RealWorks 59 HRTEM 59 GeoPerspectives 59 H4D 59 #mm f/#.# lens [002] 59 #.#x zoom lens 59 #/#.#-inch CCD [002] 59 EPSON EMP 59 Quickbird 59 colorimeters 59 IKONOS Satellite 59 IDEAL Contex 59 underwater housings 59 SmartLF 59 AN/AAQ-# 59 Thermal Emission 59 Thematic Mapper 59 AMS Instrumentation 59 XEED 59 Nikon DX 59 Leica ScanStation C# 59 Optio P# 59 Foveon X3 59 SWIR cameras 59 oblique imagery 59 uEye 59 GR DIGITAL III 59 multispectral camera 59 RF demodulator 59 polarimetric 59 FinePix S#HD 59 HXR 59 Pentax lens 59 SANYO Xacti 59 Printhead 59 GR D# 59 VisionPro 59 Micro Epsilon 59 VeeLo NextGen 59 AxioVision 59 ME# [002] 59 Digital Camera Review 59 QuickBird imagery 59 Dynamic Range Optimizer 59 Zoomify 59 UHR TOF 59 NIKKOR lens 59 LEICA 59 HD SDI output 59 Panasonic HDC TM# [002] 59 Gemcom GEMS 59 Sony DCR DVD# 59 Context Camera 59 Mobotix 59 VPL CX# 59 DMC TZ# 59 Exif Print 59 SXGA resolution 59 UK DMC2 59 COOLPIX P# [003] 59 SharpEye 59 Nextimage 59 ARRISCAN 59 SI 2K 59 StarDot 59 WindTracer 59 Noise Ninja 59 6x optical zoom 59 MOTION EYE 59 Fujitsu fi #C# 59 #mm telephoto lens 59 RX1 59 SilverFast 59 PrintVision 59 Fujinon lenses 59 FinePix F# [001] 59 Super CCD EXR 59 SCHNEIDER KREUZNACH 59 FreeFlow Print Server 59 Zoom Nikkor lens 59 RAW Workflow 59 FE SEM 59 Pentax Optio S6 59 optical zoom lenses 59 5Mp 58 PTZ Pan 58 Sony DSC T# [001] 58 KODAK EASYSHARE P# 58 #mm f#.# lens 58 C#i [001] 58 DMC FS7 58 Computed Radiography CR 58 electro optical sensors 58 LX2 58 Leaf Aptus 58 BlueView 58 Laser Radar 58 orthophotos 58 Xenics 58 Olympus E# 58 electro optical infrared 58 Megapixel CMOS 58 DMC TZ5 58 RGB #:#:# 58 Maxxum 7D 58 DISTO 58 Arecont 58 AquaShield 58 CMOS imager 58 QXGA 58 Trueflow SE 58 Moderate Resolution Imaging 58 DIGIC DV II 58 DMC TZ1 58 multibeam 58 PTU D# 58 bright F#.# 58 imagePROGRAF models 58 Fujifilm FinePix S# 58 digitisers 58 Imaging Spectrometer MERIS 58 Automatic Pallet Loader 58 Leica Viva 58 Leica Dicomar lens 58 F# EXR 58 Blackmagic UltraScope 58 HI SCAN 58 Fuji FinePix 58 H3DII 58 PhotoModeler 58 Exilim Engine 58 UV flatbed printer 58 DVD Camcorder 58 Multi Object Spectrograph 58 Envisat Advanced Synthetic Aperture 58 T.photo 58 Teledyne DALSA 58 Multibridge Extreme 58 Shuttle Radar Topography 58 #mm F#.# SAM 58 SLR lens 58 Optio A# 58 S#FS 58 iVu 58 f#.# f#.# 58 #/#.#-inch [002] 58 PowerShot S1 IS 58 Exmor ™ 58 IFSAR 58 Mamiya DM# 58 phoenix x ray 58 Optical Microscope 58 Fujinon lens 58 Canon EOS #D [003] 58 Landsat satellites 58 NearMap 58 CoVi 58 gravity gradiometry 58 aperture lens 58 interchangeable lens digital SLR 58 8MP sensor 58 Interchangeable Lens 58 Quickbird satellite 58 Gage PLUS 58 ESA Envisat satellite 58 3x Optical Zoom 58 Topo maps 58 Ricoh GXR 58 XH A1 58 OmniVision OV# 58 QImaging 58 Nikon D2Xs 58 Optio S# 58 #x# WXGA resolution 58 LEICA M9 58 6x optical zoom lens 58 telephoto zoom lens 58 MultiViewer 58 TeleEye 58 FinePix S# [002] 58 nik Sharpener Pro 58 #HS [002] 58 wavelet transform 58 Fujifilm FinePix F# [001] 58 OmniView 58 megapixel CCD camera 58 TSQ Quantum 58 Ekahau Site Survey 58 Olympus Zuiko Digital 58 orthoimagery 58 Adeptol Document Viewer 58 InSAR 58 Optio V# 58 Symagery 58 F#EXR [001] 58 NEF RAW 58 #/#.#-inch [001] 58 GigaPan Epic 58 PENTAX digital SLR 58 #HS [003] 57 multispectral 57 Pentax Kr 57 NovaMARS 57 MapIt 57 Phased Array 57 D# digital SLR [001] 57 multisensor 57 EDIUS Broadcast 57 Computed Radiography 57 Envisat Medium Resolution 57 Z# IS [002] 57 DVCS# 57 boujou 57 DSLR Camera 57 uEye ® 57 ANSI lumen 57 georeferencing 57 ED VR II 57 wavelet compression 57 NXCAM 57 D3X 57 Zuiko Digital 57 Reflection Radiometer ASTER 57 imageRunner 57 Fujifilm FinePix F#EXR [001] 57 High Definition camcorder 57 Simotion 57 radar altimeter 57 StreetMapper 57 IKONOS satellite imagery 57 ImageModeler 57 Samsung HZ#W 57 #mm f/4G ED VR 57 DSC H9 57 multiphoton 57 Visionscape ® 57 Spyder3 57 H3D 57 CMOS Sensor 57 GY HM#U 57 UV Vis spectrophotometer 57 Zoom NIKKOR lens 57 SYSTEM ARCHITECT 57 #.#Mp [002] 57 Sigma DP1 57 BIONZ processor 57 2D imager 57 halftone proofing 57 Rastek H# 57 Alpha DSLR A# 57 Nikon VR 57 GR DF# 57 CameraLink 57 GNSS receiver 57 Samsung SL# 57 Sony ICX# 57 FinePix F#EXR [001] 57 cineSpace 57 HVX# 57 #DA# 57 S NIKKOR #mm 57 waveform monitor 57 Advanced Spaceborne Thermal Emission 57 FinePix F#fd [002] 57 Nikon D2Hs 57 PowerShot SX# IS [001] 57 topographic mapping 57 MegaPixel 57 3Gb s SDI 57 Samsung CL# 57 iCapture 57 nanopositioning stages 57 #mm f/#-#.# 57 #x magnification [002] 57 CCD camcorder 57 ERDAS IMAGINE 57 AMS Instrumentation & 57 #dpi resolution [002] 57 Dynax 7D 57 Series Scanners 57 Canon XL H1 57 BIONZ image processor 57 Imaging Spectrometer 57 COOLPIX P# [002] 57 #.#M pixel 57 AXIS Q# 57 H#G 57 LIDAR Analyst 57 Canon Rebel T2i 57 EMCCD 57 Pentax Optio A# 57 Image Scanner 57 Bionz 57 MultiView 57 EM simulator 57 HyperShot 57 S Nikkor 57 infrared imager 57 eXaminer SX 57 Mobotix cameras 57 ZUIKO DIGITAL ED 57 Panasonic HDC 57 Optical Profiler 57 DSC H# 57 orthophotography 57 REALVIZ Stitcher 57 ImageConnect 57 Epson Perfection V# [001] 57 multiwavelength 57 OV# CameraChip 57 multiplexing capability 57 HDVR 57 Epson 3LCD technology 57 DMC GH2 57 GPS# [001] 57 GlyphWorks 57 JAI PULNiX 57 Digital Radiography System 57 MERIS 57 RenderDrive 57 Exoscan 57 hyperspectral imagery 57 Samsung WB# [001] 57 Anamorphic 57 AATSR 57 Leica ADS# 57 #.#T MRI 57 Sony HDCAM SR 57 FD OCT 57 INPHO 57 5Mpixel 57 Dytran 57 Medium Format 57 Raman spectrometer 57 Calibrator 57 Optical zoom 57 digital orthophotography 57 TruVision 57 panorama stitching 57 ENVISAT 57 Active Range Gated 57 VPL AW# 57 eCognition 57 Wide Dynamic Range 57 cephalometric 57 Canon iPF 57 wafer prober 57 #mm f#.# [001] 57 Strain Gauge 57 ARGUS IS 57 inertial sensor 57 PowerShot G9 57 GigaGalaxy Zoom 57 Mars Orbiter Camera 57 JVC GZ MG# 57 PhotoModeler Scanner 57 megapixel digital SLR 57 MPEG #/#/# 57 NIRCam 57 Fisheye Lens 57 KODAK Capture Software 57 EMCCD camera 57 EFI Colorproof XF 57 Live MOS sensor 57 Vitronic 57 ZR3 57 HD Everio 57 NIR SWIR 57 Fujifilm FinePix Real 57 Marmitek 57 Leica Photogrammetry Suite 57 Thermal Imagers 57 MultiVision 57 KeyView 57 ThermoVision 57 iE# 57 Kofax VRS 57 Cedip 57 FTIR spectrometer 57 PowerShot Pro1 57 Digimax L# 57 UV Visible 57 Fluke Ti# Thermal Imager 57 shortwave infrared 57 DR# [002] 57 f#.# lens 57 fundus camera 57 EW# 57 DMC GH1 57 Megapixel CCD sensor 57 Sony PMW EX1 57 hyperspectral 57 IKONOS imagery 57 SpinFire Professional 57 ART VPS 57 pixel CCD 57 Super CCD sensor 57 SiRFstarIII GPS 57 XA# 57 ProCamera 57 #mm f/#.#G 57 #:#:# RGB 57 postprocessing 57 Samsung Digimax 57 GC FM2 56 Scanning Laser 56 CanoScan #F Color 56 Optical Coherence Tomography 56 vector raster 56 Lumix FX# 56 FinePix A# 56 EF lenses 56 GuideBuilder 56 Pentax Optio E# 56 PLC XW# [001] 56 AF S NIKKOR 56 HVR Z1U 56 LUMIX G 56 Translucent Mirror Technology 56 HVR M#U 56 DMX HD# 56 geo referencing 56 Credits ESA 56 SuperPad 3 56 K#D Super 56 powerful #x optical 56 Vinten Radamec 56 AeroGRID 56 S DX Nikkor 56 ultrahigh resolution 56 JPEG TIFF 56 SuperGIS Image Server 56 SLR lenses 56 ScanEx 56 ColorProof 56 Sanyo VPC 56 Z Backscatter technology 56 datalogger 56 SpectraView II 56 QX Hawk 56 Spectrophotometer 56 Geutebruck 56 Satellite Imagery 56 Mini Converters 56 Pixim powered 56 Absorption Spectroscopy 56 Forward Looking Infrared FLIR 56 Siemens Biograph 56 HyperCrystal LCD 56 azimuthal 56 Fujinon 3x optical zoom 56 ThermaCAM 56 Fujifilm FinePix 56 #/#.# inch CCD 56 interferometric synthetic aperture radar 56 Kodak i# [001] 56 Dual Cameras 56 FotoNation FaceTracker 56 Olympus PEN E PL1 56 ePaper display 56 Canon EOS Rebel T1i 56 Expeed 56 Metromatics 56 Jason Geoscience Workbench 56 FinePix J# [002] 56 Mega Pixel 56 HD CMOS sensor 56 HD #x# 56 Olympus EVOLT E 56 super telephoto lens 56 hyperspectral sensors 56 Colortrac SmartLF 56 Reflection Radiometer 56 PIP POP 56 pancake lens 56 EXPEED image processing 56 PENTAX Optio W# 56 PowerShot S2 IS 56 Panasonic DMC 56 ScanFront 56 HP Designjet printers 56 Perfection V# 56 NASA MODIS 56 TruePic III + 56 spatially referenced 56 SK HD# 56 Volume Rendering 56 LCGS 56 Vixia 56 DCR HC# [002] 56 4X optical zoom lens 56 Leica lens 56 Exmor 56 Caplio 56 panchromatic imagery 56 Lumix G 56 teleconverter 56 MPEG -4 56 FT IR spectroscopy 56 Synthetic Aperture Radar 56 LightTools 56 #:#:# color 56 MDVR 56 VIDAR 56 Sensis MDS 56 Trimble VRS 56 optically stabilized 56 TrueColor 56 Rugged Handheld 56 gyro stabilized 56 #mm #mm equiv 56 Audyssey Dynamic EQ 56 Samsung PL# [002] 56 Perfectly Clear ® 56 Confocal 56 Epson Claria 56 Photometrics 56 Aplio 56 Encoders 56 GY HM# 56 Versant Object Database 56 DiMAGE 56 DMC TZ3 56 Leaf Valeo 56 Panasonic Lumix DMC TZ# 56 Convera RetrievalWare 56 YUV #:#:# 56 meter panchromatic 56 Stratus OCT 56 EDXRF 56 tunable filter 56 RaveGeo 56 Hyperspectral 56 LUMIX cameras 56 Fujitsu fi 56 Laser Projection 56 Multimedia Projectors 56 Artis zee 56 Minolta DiMAGE 56 HP Designjet T# [002] 56 DVEs 56 ModelMaker D 56 Blackmagic Design Announces 56 PicoScope 56 FARO Gage 56 IQeye 56 Canon Digital Elph 56 #mm f/#.#-#.# [002] 56 Coolpix P# [002] 56 Validation Tool 56 Explosives Detection Systems 56 Venus Engine FHD 56 confocal microscopes 56 Konica Minolta Maxxum 5D 56 AVCHD Lite format 56 Motion JPEG format 56 G#SE 56 tri axial 56 High Resolution Imaging 56 OptiCell 56 Xacti VPC 56 QCIF 56 ViewStation 56 PTZ dome cameras 56 PDW F# 56 HD#A 56 SOCET GXP 56 SeaWiFS 56 4x optical zoom lens 56 PENTAX K#D [002] 56 DLP Projector 56 LUMIX GF1 56 BSI CMOS 56 NOAA GOES 56 GigE interface 56 synthetic aperture 56 Compact Cameras 56 #K pixel CCD 56 S5 Pro 56 Bibble Pro 56 P2 HD 56 Dual Lens 56 Signal Generator 56 VL# [002] 56 Echoscope 56 EnSight DR 56 #:#,# scale [002] 56 #.#x optical zoom [002] 56 FinePix REAL 3D 56 Prosilica 56 ILA projector 56 inertial navigation system 56 Leica Digilux 56 4CIF 56 anamorphic lenses 56 Toshiba Infinix 56 PFTrack 56 Nikon D3s 56 Space Imaging IKONOS 56 Sony XDCAM EX 56 Sentiris 56 Olympus E PL2 56 Aplio MX 56 Instant Digital Camera 56 Image Processor 56 Sensis multilateration 56 HDRI 56 Spectrograph 56 HORIBA Jobin Yvon 56 Autobrite 56 sunlight readable touchscreen 56 iSMART 56 detector arrays 56 Pentax digital SLR 56 F#fd [002] 56 Volicon Observer 56 shortwave infrared SWIR 56 Contrast AF 56 JVC GY HD# 56 bathymetric 56 ADXL# 56 Geomatica 56 multiview 56 DualBeam 56 Laser Scanning 56 HDD camcorder 56 MOBOTIX 56 model A# 56 HDCam 56 PhotoEnhance 56 Ricoh MFPs 56 Mega Pixels 56 LandVoyage.com 56 DeckLink HD 56 AXIS M# [002] 56 KODAK VERSAMARK 56 DSC H1 56 servo controller 56 proprietary Zone Sonography 56 Quik Pod TM 56 FT IR spectrometer 56 Nikon Digital SLR 56 portable CMM 56 Leica S2 56 multispectral imaging 56 Anaglyph 56 HDLink Pro 56 Dual Frequency 56 Image Stabilisation 56 photogrammetric mapping 56 confocal laser scanning 56 FARO Laser Scanner LS 56 #Mp 56 HDR UX1 56 MT#M# 56 native XGA resolution 56 XDCAM HD 56 Toshiba Teli 56 HDS# 56 Nikon D3 56 uPrint Plus 56 Panasonic DMC FZ# 56 DLP Pico ™ 56 Fujifilm FinePix S#HD 56 #HS [001] 56 Stitcher Unlimited 56 CDISC ODM 56 Wireless File Transmitter 56 EX FC# 56 Kodak Easyshare V# 56 Sarix 56 background defocus 56 3CCD camera 56 Pixel Xtream 56 ABAQUS CAE 56 KODAK EASYSHARE V# [002] 56 efector 55 Xenon Flash 55 inkjet proofing 55 UHF SATCOM 55 Auto Lighting Optimizer 55 OmniCast 55 optical sectioning 55 Nikon digital SLR 55 JPEG# compression 55 micron pixel pitch 55 AG HMC# [002] 55 RTK corrections 55 TECNIS ® 55 Photoshop Plug 55 postprocessor 55 #mm F#.# [002] 55 TrueFocus 55 BookDrive Pro 55 #x# pixel resolution [001] 55 H2 PRO 55 Pixxures 55 WVR# 55 megapixel DSLR 55 #bit ADC 55 ProSafe RS 55 Color Scanner 55 BravoPro 55 Infrared Camera 55 Laser Scanner 55 #DV 55 NI PCIe 55 PowerShot A# IS [002] 55 Oracle Spatial #g 55 Designjet 55 LUMIX G1 55 megapixel CCD sensor 55 AJ SDX# 55 RICOH Pro 55 VDC DS 55 #mm f/#.# Macro 55 megapixel FinePix 55 VectorSeis 55 MTM# 55 CAM# 55 3in LCD screen 55 Nikon D#s [001] 55 WindSim 55 4K projector 55 RemoteView 55 VDR D# 55 AAMHatch 55 XL H1A 55 softcopy 55 DSC T# [002] 55 Supernova Epic 55 Adimec 55 IEC #-# compliant 55 confocal 55 Data Logger 55 BRAVIA ENGINE 55 IVMS 55 QuickBird 55 XR#V 55 upconverters 55 GeoData 55 DMC FZ# [002] 55 #K pixel 55 Reader DL# [001] 55 QWIP 55 Zeiss lenses 55 Ascent Capture 55 ScanScope 55 Stylus Verve S 55 Motionflow #Hz 55 TWX# 55 #/#.# inch 55 FinePix F#EXR [002] 55 TX7 55 H.# HD 55 ArcSoft MediaImpression 55 Macro Lens 55 Aixplorer 55 Digidesign Pro Tools 55 ImmerVision Enables 55 MINOX 55 megapixel Lumix 55 ClearVid CMOS Sensor 55 SmartTrack 55 Sonardyne 55 MrSID Generation 4 55 imager 55 ProxSys 55 CineAlta 55 Sanyo Xacti VPC 55 EX ZR# [002] 55 panchromatic 55 EOS Rebel XSi 55 IKONOS 55 ESA Envisat 55 H2D 55 Coolpix S# [002] 55 arbitrary waveform generators 55 DIGIMAX 55 BuckEye 55 XF# Professional Camcorders 55 fiberscopes 55 Primatte 55 #/#-inch CCDs 55 AURIGA 55 Genetec Omnicast 55 NUUO 55 AG DVX#A 55 Single Photon Emission Computed 55 CX5 55 LEICA DC VARIO ELMARIT 55 laser interferometer 55 Spectra T# 55 Paradigm SKUA 55 DC VARIO ELMARIT lens 55 EDAConnect 55 radar altimeters 55 DxO 55 stereoscopic images 55 Ordnance Survey MasterMap 55 Tessera OptiML 55 XH G1 55 X ray microanalysis 55 MobileMapper CX 55 HD SD SDI 55 Fujifilm FinePix F#EXR [002] 55 Audio Dolby Digital 55 TWAIN compliant 55 rangefinder camera 55 pixel CMOS 55 Cineflex 55 PrecisionHD USB Camera 55 DNG file 55 Z Backscatter X ray 55 Ikonos satellite 55 QuickScan 55 laser altimeter 55 Schneider KREUZNACH lens 55 Image Stabilizer IS 55 ZUIKO DIGITAL 55 DR #C scanner 55 i TTL flash 55 Envisat satellites 55 multi spectral 55 Coriolis flowmeter 55 electro-optical/infrared 55 LMI Technologies 55 Force Microscopy 55 Sigma DP2 55 4X zoom 55 Foveon sensor 55 HDR FX7 55 Sysdrill 55 microspectrophotometer 55 5x zoom lens 55 Panasonic Lumix DMC GF2 55 KODAK STACCATO Screening 55 GelSprinter 55 Kinoton 55 JX# [002] 55 HDR Expose 55 iTrax 55 #x anisotropic filtering 55 PhotoStudio 55 infrared illuminators 55 DSC H7 55 NanoDrop 55 Skyray XRF 55 uncompressed RAW 55 Megazoom 55 inkset 55 Crypto Complete 55 GenICam 55 PC DMIS 55 iridix 55 IS Digital Camera 55 Angenieux 55 HP Scitex FB# Printer [001] 55 S DX NIKKOR 55 Nikon ViewNX 55 MJ Harden 55 RS# serial interface