Noto Sans Old South Arabian
Google Fonts · Google · 2014

A highly specialised sans-serif designed solely to support the Old South Arabian script within the Noto universal type system.
About
Noto Sans Old South Arabian exists to fill a precise gap in Unicode coverage, rendering an ancient script used across the Arabian Peninsula before the Common Era. Its design is functional rather than expressive, subordinating aesthetics to scholarly and archival utility. It is best suited to academic texts, linguistic databases, and digital heritage projects requiring accurate script representation.
Classification
Part of Google's Noto project, designed to render Old South Arabian script — an ancient South Semitic alphabet — without tofu (missing glyph boxes). Clean, neutral letterforms prioritise legibility and historical accuracy over stylistic expression.