Old North Arabian Letter Alef (U+10A91) is a Unicode other letter from the Old North Arabian block. It resides on Plane 1 (SMP, Supplementary Multilingual Plane), has bidirectional class R (right-to-left), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as 𐪑 or 𐪑. Because it is outside the Basic Multilingual Plane, proper font support is required; otherwise a fallback box may be shown.