The following writing scripts have not been allocated an ISO 15924 code.

• APL
• Avoiuli script
• Aztec script
• Badaga
• Bagam
• Balti A
• Balti B
• Bété
• Bhujimol script
• Borama
• Bronze scripts
• Brusha
• Byblos
• Chalukya
• Chola
• Coorgi–Cox alphabet
• Dhimal
• Eebee Hmog
• Epi Olmec
• Ersu Shaba script
• Eskaya
• Fula alphabets
• Gabelsberger shorthand
• Gangga Malayu
• Gregg shorthand
• Great Lakes Algonquian syllabics
• Gurung (khe phri)
• Gugyeol
• Gupta script
• Hamnosys
• Iban
• iConji
• Indus Valley script
• IsiBheqe soHlamvu
• Kadamba
• Kaddare
• Kaida
• Karani
• Kherinci
• Khamti
• Khati baburi
• Khitan large script
• Khom script (Ong Kommadam)
• Khom Thai script
• Khotanese
• Kpelle
• Kulitan
• Lampung
• Laṇḍā scripts
• Leke
• Linear Elamite
• Lontara
• Luo
• Mangar akkha
• Mandombe
• Marchung
• Masaba
• Maya script
• Mi'kmaw hieroglyphs
• Minangkabau
• Mixtec
• Moon
• Mwangwego script
• Naasioi
• Nasu
• Nisu
• Northern paleohispanic
• Numidian
• Nwagu Aneke script
• Old Minahasa
• Olmec
• Oracle bone script
• Pallava
• Pau Cin Hau logographs
• Pitman shorthand
• Proto elamit
• Proto sinaitic
• Pungchen
• Pungchung
• Pyu
• Quikscript
• Raina kama
• Ranajana
• Romanian transitional alphabet
• Rongo rongo
• Salifou hausa
• Sani yi
• Satavahana
• Seal script
• Shankha
• Shuishui logograms
• Sirmauri
• Sitelen Pona
• Southern Paleohospanic
• Stokoe
• Szarvas inscription
• Tani
• Teeline Shorthand
• Teotihuacan
• Tikamuli
• Tironian notes
• Tocharian script
• Unifon
• Vtafi
• Vtai yo
• Vtangsa
• Vatteluttu
• Veso Bey
• Visible Speech
• Western Cham
• Woleai
• Zapotec
• Zou
• Some fictional constructed writing systems

See also

• ISO 15924
• List of ISO 15924 codes by letter code
• Under-ConScript Unicode Registry  – Encoding of artificial scriptsPages displaying short descriptions of redirect targets