Short answers, pulled from the story.
The Brahmi script appeared on stone pillars during the reign of Ashoka in the 3rd century BCE. These imperial edicts marked the first clear evidence of this writing system across ancient India.
Northern Brahmic evolution produced diverse systems including Gurmukhi, Devanagari, Odia, and Tibetan while Vatteluttu and Kadamba scripts shaped the southern tradition. By the 7th or 8th century distinct scripts like Nagari, Siddham, and Sharada had developed independently within these groups.
Pallava influence extended through Tamil-Brahmi variants that eventually became Khmer, Thai, and Lao scripts by the 8th century. Maritime trade networks carried these writing systems across the Bay of Bengal to Indonesia and mainland Southeast Asia where local varieties emerged at trading posts.
Each consonant carries an inherent vowel sound usually represented by short schwa phoneme. Additional vowels appear as marks added directly to the base character rather than separate letters though a special mark called virama can indicate the absence of this inherent vowel.
Hindu-Arabic numerals evolved directly from Brahmi digits found in ancient inscriptions with the sequence 0 through 9 tracing its lineage back to Brahmi numbers used during early centuries CE. These numerical symbols spread alongside written language to become the global standard for counting today.