plt-scheme.org

Plt-scheme.org is about innovative programming language

Advocacy and authoring group, umbrella name for family of implementations: DrScheme (Scheme, MzScheme, MrEd); books: How to Design Programs, How to Use Scheme; and TeachScheme!

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Authority

67/100

Safety

85/100

Registered

Jun 16, 1999

27 years old · Squarespace Domains II LLC

0 of 2 safety checks passed (Sep 10, 2026).

AboutUs has not vetted this site. 2 of 2 automated safety checks did not pass. Everything below is what we could measure automatically. Anything you do on the site — paying, sharing personal details, downloading — is between you and the site, not AboutUs.

Current facts

What AboutUs observed on the live site and in WHOIS/DNS today. These are measurements, not an endorsement of the site.

checked now

Domain registered Jun 16, 1999 — 27 years old.

checked now

Registrar today: Squarespace Domains II LLC — unchanged since AboutUs began tracking (Sep 1, 2026).

Trust record

Authority & Safety, with the evidence

How this is scored →

Authority 67/100 — ahead of 67% of scored sitesSome caution flags

Why this authority score

Prominence (Open PageRank 3.1/10)+7
Verified continuity: 27.2 years (RDAP registration)+11
Security & email hygiene+3
Calibration adjustment (published map)+13

Every point maps to a sentence. These lines sum to the model score of 34/99, which is what places this site at 67/100 against every other scored site.

Safety evidence

No valid HTTPS today

Site history

Dated record — historical facts always carry their date.

1999
Domain registered (Jun 16, 1999).
2026
Checked today — 0 of 2 safety checks passed (Sep 10, 2026).

✓ domain continuity 27 years registered✓ live verified Sep 10, 2026

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