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S. 143.4: GIMP; S. 144.1: Bildwerkstatt Till Traub, Leonberg; S. 144.2.1: sankai / Getty Images; S. 144.2.2: sankai / Getty Images; S. 146.1: Maskot / Getty Images; S. 147.2.1: GIMP; S. 147.2.2: fotomorgana / Fotolia; S. 147.3: Petri Oeschger / Getty Images; S. 148.1: RAMISETTY PRIYASAHITHI / Shutterstock; S. 148.2.1: RAMISETTY PRIYASAHITHI / Shutterstock; S. 148.2.2: GIMP; S. 149: Adene Sanchez / Getty Images; S. 150.2.1: acilo / Getty Images; S. 150.2.2: acilo / Getty Images; S. 152.1: Ragnar Schmuck / Getty Images; S. 152.2: GIMP; S. 153: simpson33 / Getty Images – iStockphoto; S. 154.1: fstop123 / Getty Images; S. 155.2: Audacity; S. 155.3: Audacity; S. 155: Wavebreakmedia / Getty Images – iStockphoto; S. 157.3: Audacity; S. 158.1: lzf / Getty Images – iStockphoto; S. 158.2.1: Microsoft Corporation; S. 158.2.2: janifest / stock.adobe.com; S. 159.3.1: Microsoft Corporation; S. 159.3.2: janifest / stock.adobe.com; S. 160.2: GIMP; S. 162.1: Roman Valiev / Getty Images – iStockphoto; S. 163.2: HMVart / Getty Images; S. 166.1: hayatikayhan / Getty Images – iStockphoto; S. 166.2: Morsa Images / Getty Images; S. 167.3: Morsa Images / Getty Images; S. 167.4: Morsa Images / Getty Images; S. 170: utah778 / Getty Images – iStockphoto; S. 171.1: tolgart / Getty Images – iStockphoto; S. 171.2: Erikona / Getty Images – iStockphoto; S. 171.3: Blue Planet Studio / Getty Images – iStockphoto; S. 171.4: lekkyjustdoit / Getty Images – iStockphoto; S. 172.1.1: Ar Ducha Misfa‘i / Getty Images – iStockphoto; S. 172.1.2: Oleg Mishutin / Getty Images – iStockphoto; S. 172.1.3: CagriOner / Getty Images; S. 172.1.4: pictafolio / Getty Images; S. 173.2: Mozilla Corporation, Mountain View (Kalifornien); S. 174.1.1: John Elk / Getty Images; S. 174.1.2: pidjoe / Getty Images – iStockphoto; S. 174.1.3: 4x6 / Getty Images – iStockphoto; S. 174.1.4: Panptys / Getty Images – iStockphoto; S. 174.1.5: Irinavk / Getty Images – iStockphoto; S. 174.1.6: andresr / Getty Images; S. 166.1.7: Ikonoklast Fotografie / Shutterstock; S. 166.1.8: Diana Haronis / Getty Images; 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S. 217.8: Scratch – CC BY-SA 2.0 / https://creativecommons.org/ licenses/by-sa/2.0/; S. 218.1: Scratch – CC BY-SA 2.0 / https:// creativecommons.org/licenses/by-sa/2.0/; S. 219.2: Scratch – CC BY-SA 2.0 / https://creativecommons.org/licenses/by-sa/2.0/; S. 219.3: Scratch – CC BY-SA 2.0 / https://creativecommons.org/ licenses/by-sa/2.0/; S. 221.2: Scratch – CC BY-SA 2.0 / https:// creativecommons.org/licenses/by-sa/2.0/; S. 221.3: Scratch – CC BY-SA 2.0 / https://creativecommons.org/licenses/by-sa/2.0/; S. 222.1: Scratch – CC BY-SA 2.0 / https://creativecommons.org/ licenses/by-sa/2.0/; S. 222.2: Scratch – CC BY-SA 2.0 / https:// creativecommons.org/licenses/by-sa/2.0/; S. 223.3: Scratch – CC BY-SA 2.0 / https://creativecommons.org/licenses/by-sa/2.0/; S. 223.4: Scratch – CC BY-SA 2.0 / https://creativecommons.org/ licenses/by-sa/2.0/; S. 224.1: Scratch – CC BY-SA 2.0 / https:// creativecommons.org/licenses/by-sa/2.0/; S. 224.2: Scratch – CC BY-SA 2.0 / https://creativecommons.org/licenses/by-sa/2.0/; S. 225.3: Scratch – CC BY-SA 2.0 / https://creativecommons.org/ licenses/by-sa/2.0/; S. 225.4: Scratch – CC BY-SA 2.0 / https:// creativecommons.org/licenses/by-sa/2.0/; S. 226-227: Bildwerkstatt Till Traub, Leonberg *3 Lizenzbestimmungen zu CC-BY-SA-4.0 siehe: http://creativecommons.org/licenses/by-sa/4.0/legalcode Nutzung der Screenshots von PowerPoint, Excel, Word, Outlook und Visual Basic mit freundlicher Genehmigung der Microsoft Corporation. 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