套件： ppmd (9.1-16)
fast archiver program with good compression ratio
ppmd predicts the probability of a given character based on the characters that immediately precede it (as all PPM compressors, see also Markov Chains and Context Modeling). This archiver should be better than zip, gzip, bzip2, zzip, szip and ppmz(2) at compressing files.
其他與 ppmd 有關的套件