The block has 194 ideographic variation sequences registered in the Unicode Ideographic Variation Database (IVD). Aztec was pictographic and ideographic proto-writing, augmented by phonetic rebuses. The Mayan system used logograms with phonetic complements like the Egyptian, while lacking ideographic components. Many logograms have an ideographic component (Chinese "radicals", hieroglyphic "determiners"). Linear B consists of around 87 syllabic signs and over 100 ideographic signs. It features his invented script of ideographic geometric and curvilinear glyphs. Writing systems were preceded by proto-writing, systems of ideographic and/or early mnemonic symbols. In Unicode this character is , in the Ideographic Symbols and Punctuation block. This font partially covers the Unicode Plane Two Supplementary Ideographic Plane. This font covers a few characters in the Unicode Plane Two Supplementary Ideographic Plane. An iteration mark, , was included in the Ideographic Symbols and Punctuation block. Ideographic writing scripts such as Chinese and Japanese do not have fixed collections of characters. Tiwaz rune was a ideographic symbol for a spear. It is the first block to be allocated to the Tertiary Ideographic Plane. He coins the term ideographic for them.