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Imagine travelling back to the year 2000 and telling someone that in less than two decades we will carry slim rectangular devices that are connected wirelessly to the world. The devices will have crystal-clear screens and run dozens of computer applications, from banking and financial management programs to fitness monitoring and health games among countless others. And all of these applications will be controlled not by a keyboard or mouse but by tapping and swiping a finger across the device’s interactive display.

CareerCast.com, a site to search for job opportunities by industry, function and location, has prepared an annual Jobs Rated report for almost three decades. Over those years, the workplace has evolved and changed dramatically, but one trend is clear: as the world becomes ever-more connected, quantitative and drenched in data, careers in computer science will increasingly take centre stage.

The earliest example of cryptography — the study and practice of techniques to make communications secure — is thought to be a section of nonstandard hieroglyphics that was inscribed on the tomb of Khnumhotep II, an Egyptian nobleman who served pharaoh Amenemhat nearly 4,000 years ago.