Autism with speech impairment?

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Just curious, what's the difference between dyspraxia and apraxia, and what is CAS? Would simple, common articulation errors/delays (/l/, /r/, /th/) be considered dyspraxia?

Apraxia- without movement, dyspraxia- impaired... but in general dyspraxia is term referred to mild motor coordination impairment known as DCD (developmental coordination disorder) which affects gross/fine motor abilities but not speech, and CAS-childhood apraxia of speech- neuromotor speech disorder (moderate to severe disorder)---> problem is in CNS (cortical and subcortical speech zones) that affects motor planning and programming not the execution of speech (like in dysarthria or dyslalia-pure articulatory disorder) although we see it that way...and no, articulatory disorders are not dyspraxias since they don't have from CNS etiology and they are purely developmental mild disorder of execution not planning/programming, or they originate from phonological disorder... and there are more types of apraxia- limb apraxia, occulomotor apraxi, ideomotor and ideational apraxia. Hope it helps.