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+A quick reference of the sigils and their meaning:
+
+| Sigil | Meaning |
+| ----- | ------- |
+|  `~`  | Owned pointer; like a normal value, but always pointer-sized, and allocated on the heap |
+|  `&`  | Borrowed pointer; a pointer to data that you do not own and thus cannot free |
+| `&mut`| Mutable borrowed pointer; like a borrowed pointer, but cannot alias with any other pointer, and you can mutate through it |
+|  `@`  | Managed pointer; a pointer to data that no one owns. Allows cycles. Garbage collected |
+|  `'`  | Lifetime/label marker; used to label loops for labeled break and to indicate the lifetime of a borrowed pointer (eg `&'a T`) |
+|  `*`  | Raw pointer; just like a pointer in C. Requires unsafe code to dereference. Can be NULL |
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