Series 90 may refer to:

• Express Series 90, an American homebuilt aircraft design

• UNIVAC Series 90, mainframe computers
• Series 90 (software platform), a platform for mobile phones that uses Symbian OS
• UNIVAC Series 90, line of mainframe computers

• JNR 90 series, prototype of JNR 101 series electric multiple unit

This disambiguation page lists articles associated with the title Series 90.
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