Elysse Bell is a finance and business writer for Investopedia. She writes about small business, personal finance, technology, and more. Erika Rasure is globally-recognized as a leading consumer ...

The simple interest formula is Interest = P * R * T. Many, or all, of the products featured on this page are from our advertising partners who compensate us when you take certain actions on our ...

As Andy Hertzfeld describes on folklore.org, early Apple employee Chris Espinoza drew a calculator for the Macintosh. He showed it to Steve Jobs. Jobs’s response? “Well,” he said, “it’s a start, but ...

The Macintosh 128K, released by Apple Computer in 1984, was equipped with System 1.0, the earliest version of the Mac OS. System 1.0 included a desktop calculator app, which is said to have been ...

Apple co-founder Steve Jobs was infamous for his harsh critiques of the work of his team. Hardware or software, if Steve wasn’t 100% happy, you would certainly know about it. Chris Espinosa, who wrote ...

As somebody who has the same obsessive attention to visual detail as Jobs and who has never been able to exercise it fully in order to build elegant software despite being naturally inclined, I really ...

In February 1982, Apple employee #8 Chris Espinosa faced a problem that would feel familiar to anyone who has ever had a micromanaging boss: Steve Jobs wouldn’t stop critiquing his calculator design ...

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Property management company Daisy has launched a free Web-based tool that allows condo and co-op owners to understand looming penalties under New York City’s Local Law 97 (LL97). Carbon Curve, an ...

I am a software engineer and web developer from Nepal. My interests range from technology to education. Building a simple calculator using HTML and JavaScript may be a fun and educational job for web ...