Z with stroke
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It was used in the Jaŋalif alphabet (as a part of Uniform Turkic Alphabet) for the Tatar language in the first half of the 20th century to represent a voiced postalveolar fricative [ʒ], now written j. It was also used in the 1992 Latin Chechen spelling as voiced postalveolar fricative [ʒ]. It was also used a 1931 variant of the Karelian alphabet for the Tver dialect.
As handwriting 
As currency 
Ƶ is used as a currency symbol in the video game EVE Online to represent the in-game currency Interstellar Kredits (ISK).
In science 
Uses on computers 
The Unicode of uppercase Ƶ is 01B5, while the lowercase ƶ is 01B6.
Letter Z with diacritics
Letters using stroke sign ( ◌̵ )