Polymorphic forms of 3–piperidine-2,6-dione are disclosed. The present invention also provides assay reagents and packaged kits useful for performing enzymatic measurement of imatinib mesylate and other bcr-abl protein kinase inhibitors in biological samples. In some embodiments, the allocating may comprise allocating using a resource allocator of the lock-free vector. Inbound requests are received from over the bus and are intended for the cache. A security table topwork surface clamp includes a cable clamp having a fixed or adjustably sized generally C-shaped clamp body insertable over a table top or other flat work surface.