There’s a nice timeline. I well remember compact on unix and can possibly remember pack too: that’s Huffman with a static table, as opposed to an adaptive Huffman. Many links within the article.
Other vendors began using similar techniques: sliding dictionary plus statistical compressions such as Huffman and Shannon-Fano. (I wondered why they used Shannon-Fano rather than Huffman which is guaranteed to compress tighter than Shannon-Fano. As it turned out, a then-popular book on compression published in U.S. contained a wrong description and buggy sample programs, such that Shannon-Fano outperformed (buggy) Huffman on many files.)