page_title: Vacuum tube computer
hierarchical_section_title: Vacuum tube computer
caption_attribution_description: Atanasoff-Berry Computer at Durhum Center, Iowa State University
context_page_description: A vacuum tube computer, now termed a first-generation computer, is a computer that uses vacuum tubes for logic circuitry. Although superseded by second generation, transistorized computers, vacuum tube computers continued to be built into the 1960s. These computers were mostly one-of-a-kind designs.
context_section_description: A vacuum tube computer, now termed a first-generation computer, is a computer that uses vacuum tubes for logic circuitry. Although superseded by second generation, transistorized computers, vacuum tube computers continued to be built into the 1960s. These computers were mostly one-of-a-kind designs.
caption: Replica of the Atanasoff–Berry computer replica at Iowa State University
exif: {"Image ImageWidth": "1600", "Image ImageLength": "1200", "Image BitsPerSample": "[8, 8, 8]", "Image PhotometricInterpretation": "2", "Image ImageDescription": "OLYMPUS DIGITAL CAMERA", "Image Make": "OLYMPUS OPTICAL CO.,LTD", "Image Model": "C700UZ", "Image Orientation": "Horizontal (normal)", "Image SamplesPerPixel": "3", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop Elements 11.0 Windows", "Image DateTime": "2014:09:22 22:44:38", "Image YCbCrPositioning": "Co-sited", "Image ExifOffset": "340", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "1002", "Thumbnail JPEGInterchangeFormatLength": "9823", "EXIF ExposureTime": "1/5", "EXIF FNumber": "14/5", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "200", "EXIF ExifVersion": "0210", "EXIF DateTimeOriginal": "0000:00:00 00:00:00", "EXIF DateTimeDigitized": "0000:00:00 00:00:00", "EXIF ComponentsConfiguration": "YCbCr", "EXIF CompressedBitsPerPixel": "4", "EXIF ShutterSpeedValue": "290241/125000", "EXIF ApertureValue": "1485427/500000", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "3", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Tungsten (incandescent light)", "EXIF Flash": "Flash did not fire", "EXIF FocalLength": "59/10", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "1042", "EXIF ExifImageLength": "1156", "Interoperability InteroperabilityIndex": "R98", "Interoperability InteroperabilityVersion": "[48, 49, 48, 48]", "EXIF InteroperabilityOffset": "876", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed"}