A method of analyzing nucleic acids from cells, comprising: (a) providing a plurality of partitions, comprising a plurality of cells and a plurality of beads, wherein discrete partitions of the plurality of partitions comprise an individual cell and a bead coupled to at least 1,000 oligonucleotides having a common nucleic acid barcode sequence, which individual cell includes a plurality of nucleic acids, wherein each oligonucleotide of the at least 1,000 oligonucleotides comprises a unique molecular sequence segment that varies across the at least 1,000 oligonucleotides, and wherein the barcode sequences vary between partitions; (b) generating one or more first nucleic acid sequences derived from the plurality of nucleic acids within a discrete partition, which one or more first nucleic acid sequences have attached thereto oligonucleotides that comprise the common nucleic acid barcode sequence and the unique molecular sequence segment; (c) pooling contents of the plurality of partitions; (d) generating a characterization of the one or more first nucleic acid sequences or one or more second nucleic acid sequences, which one or more second nucleic acid sequences are derived from the one or more first nucleic acid sequences and comprise the common barcode sequence and the unique molecular sequence segment; (e) identifying the one or more first nucleic acid sequences or one or more second nucleic acid sequences as being derived from the individual cell based, at least in part, upon a presence of the common nucleic acid barcode sequence in the characterization generated in (d); and (f) determining an amount of at least a subset of the plurality of nucleic acids based, at least in part, upon a presence of the unique molecular sequence segment on each of the one or more first nucleic acid sequences or the one or more second nucleic acid sequences. (a) providing a plurality of partitions, comprising a plurality of cells and a plurality of beads, wherein discrete partitions of the plurality of partitions comprise an individual cell and a bead coupled to at least 1,000 oligonucleotides having a common nucleic acid barcode sequence, which individual cell includes a plurality of nucleic acids, wherein each oligonucleotide of the at least 1,000 oligonucleotides comprises a unique molecular sequence segment that varies across the at least 1,000 oligonucleotides, and wherein the barcode sequences vary between partitions; (b) generating one or more first nucleic acid sequences derived from the plurality of nucleic acids within a discrete partition, which one or more first nucleic acid sequences have attached thereto oligonucleotides that comprise the common nucleic acid barcode sequence and the unique molecular sequence segment; (c) pooling contents of the plurality of partitions; (d) generating a characterization of the one or more first nucleic acid sequences or one or more second nucleic acid sequences, which one or more second nucleic acid sequences are derived from the one or more first nucleic acid sequences and comprise the common barcode sequence and the unique molecular sequence segment; (e) identifying the one or more first nucleic acid sequences or one or more second nucleic acid sequences as being derived from the individual cell based, at least in part, upon a presence of the common nucleic acid barcode sequence in the characterization generated in (d); and (f) determining an amount of at least a subset of the plurality of nucleic acids based, at least in part, upon a presence of the unique molecular sequence segment on each of the one or more first nucleic acid sequences or the one or more second nucleic acid sequences. <EOS>