Technology

8 questions in Technology, free to read.

• 2026 breakthroughs in tandem perovskite solar and textile recycling
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• A verification process for answering fast-moving news without hallucinating
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• AI data-center energy and water use projections to 2030
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• In Ada, what does the expression 5 mod (-3) evaluate to, and how does that differ from 5 rem (-3)?
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• In DOS, exactly how many bytes is the High Memory Area (HMA), and why isn't it a full 64K?
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• On DOS, what is the size of the EMS page frame, and how does expanded memory (EMS) differ from extended memory (XMS)?
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• In a COBOL COMP-3 (packed decimal) field, where is the sign stored, and what hex values represent positive vs. negative?
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• In fixed-form FORTRAN 77, what does a non-blank, non-zero character in column 6 of a line mean?
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