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    • How we almost ended up with a bull’s-eye bar code

      How we almost ended up with a bull’s-eye bar code

      The Conversation via Yahoo News Singapore· 3 days ago

      Kartrak bar codes were developed to automatically identify rail cars as they moved past scanners, but they used a design of lines of varying colors that...

    • How do heat and cold-health alerts work?

      How do heat and cold-health alerts work?

      BBC via Yahoo News Singapore· 2 days ago

      Yellow Yellow alerts...or cold weather that are only likely to affect those who are particularly vulnerable, for example the elderly, or those with...