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Quick answers
When should I pick Open icon systems?
When the story is: slides, product UI, posters, school worksheets.
When should I avoid Open icon systems?
Skip it in cases like: mixing five icon styles on one slide.
Who invented or popularised it?
Feather to Lucide and other ISC/MIT SVG icon families on GitHub
What does it encode?
stroke or fill metaphors at a shared grid and weight
Is it OK in ads?
Yes if one claim is visible at a glance in Meta, Google and retail print; otherwise link to a full figure.
Will a teacher accept it?
Yes for lab reports and poster boards if axes, units and a source line are present.
Open icon systems encodes values as stroke or fill metaphors at a shared grid and weight. Feather to Lucide and other ISC/MIT SVG icon families on GitHub.
In reports, ads and assignments it fits slides, product UI, posters, school worksheets. Skip it when mixing five icon styles on one slide.
Use when
- Use when 1 — Use Open icon systems when the story is slides, product UI, posters, school worksheets.
- Use when 2 — Build the first draft in Excel or Google Sheets, then restyle — do not screenshot.
- Use when 3 — In PowerPoint, one Open icon systems per slide, claim in the title.
- Use when 4 — For lab reports and poster boards, this form works when the question is comparison or process.
- Use when 5 — In Meta, Google and retail print, keep one number visible at thumbnail size.
Avoid when
- Avoid when 1 — Skip Open icon systems in cases like: mixing five icon styles on one slide.
- Avoid when 2 — 3-D, dual axes, rainbow scales
- Avoid when 3 — Undated numbers, undated time series
- Avoid when 4 — Four charts on one slide
Audiences
- Work — PowerPoint
- Ads — Meta, Google and retail print
- School — lab reports and poster boards
Open icon systems: honour stroke or fill metaphors at a shared grid and weight, and switch when mixing five icon styles on one slide.