What is the significance of each of these sets?                            Other_Puzzling_Stuff
Each set is either a sequence, a subsequence, or marked with an asterisk (*);
               and many pursits may argue about there needing to be more of them.
This list was originally written circa 1959-1962 (which is marginally significant),
     and has only recently been re-discovered, scanned, OCR'ed, and edit/corrected.
Each item has been re-identified, except those marked with a question-mark(?);
          (They say that memory is one of the first things to go.)
     if any of those are recognized, please let me know.
There are NO prizes: just the satisfaction of knowning that you got it.

     1.  3x5, 5x7, 8x10

     2.  2x4, 4x8, 6x12

     3.  7 - 4 - 76

     4.  1, 1.4, 2, 2.8, 4, 5.6, 8, 11, 16

     5.  211, 300, 303, 2-1/2

     6.  1, 5, 3, 6, 2, 4

     7.  11 - 11 - 18

     8.  3x5,4x6, 5x8

     9.  6x30, 7x35, 7x50, 8x50, 10x50, 20x60

  ? 10.  103, 123, 203, 473, 683, 753, 104, 124, 204

  * 11.  120, 127, 620, 828

    12.  3, 4, 6, 8, 12, 16

    13.  25, 40, 60, 75, 100, 150

  ? 14.  8/0, 6/0, 4/0, 2/0, 0, 1, 1-1/2, 2

    15.  8, 6, 4, 2, 1, 1/0, 2/0, 3/0, 4/0, 250000, 300000

    16.  1/2, 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2, 3, 3-1/2, 4

    17.  6, 12, 28, 110

    18.  1, 5, 10, 25, 50

    19.  12:30, 4:30, 8:30, 12:30, 4:30, 8:30, repeating

    20.  1, 8, 4, 3, 6, 5, 7, 2

    21.  A, D, G, J, M, P, T, W

    22.  1430, 1506, 1682, 1758, 1834, 1910, 1986

  * 23.  209, 213, 408, 415, 707, 714, 805, 916

  ? 24.  7, 10, 12, 14, 16, 17, 19, 20, 21, 23, 24, 27

  ? 25.  4, 8, 16, 50, 250, 333, 500

    26.  2, 4, 5, 7, 9, 11, 13

    27.  50, 60, 400, 5000

    28.  q, w, e, r, t, y, u, i, o, p

    29.  1, 2, 5, 10, 20, 50

  * 30.  E, A, I, O, U

    31.  1, 4, 7, 9, 11, 12, 14, 16, 19, 20, 23, 24, 27, 28, 31,
         32, 35, 40, (rounded)

  * 32.  44, 47, 51, 55, 63, 82, 1819, 4030, 4412

  * 33.  Right, Red, Ring

    34.  1, 3, 6, 10, 15, 21, 28, 36, 45, 55

    35.  640, 1240

    36.  1, 2, 3, 5, 7, 11, 13, 17, 19, 23

    37.  8, 5, 4, 9, 1, 7, 6, 3, 2, 0

    38.  36 - 24 - 36

    39.  1, 2, 10, 11, 12, 20, 21, 22, 100

  * 40.  5, 10, 405

    41.  Z, O, T, T, F, F, S, S, E, N, T

    42.  2, 4, 8, 16, 32

    43.  1, 1, 2, 6, 24, 120, 720

    44.  12, 3, 5-1/2, 40, 8, 3

  ? 45.  1, 3, 5, 7, 9, 11

  * 46.  6, 60, 66, 70, 91, 99, 101, 395, 466

    47.  1728, 27

    48.  50, 100, 220, 440, 880

    49.  144, 9, 30-1/4, 160, 640

    50.  1-7/8, 3-3/4, 7-1/2, 15

    51.  1, 4, 9, 16, 25, 36

    52.  I, V, X, L, C, D, M

    53.  .22, .32, .38, .44, .45

    54.  10, 25, 32, 100, 160

    55.  J, Q, K, A

    56.  J, M, M, J, A, O, D

    57.  J, F, M, A, M, J, J, A, S, O, N, D

    58.  6, 8, 12, 24

  ? 59.  8, 10, 12, 14, 16, 18, 20, 22, 24

    60.  J, F, M, S, M, A, M, J, S, J, J, A, S, A, S, O, N, D, W, D, repeating

    61.  .410, 28, 20, 16, 12, 10, 8

    62.  p, c, f, s, t, s, 1, c, r

    63.  A, J, S, N

    64.  20/10, 20/20, 20/30, 20/40, 20/100, 20/N

    65.  b, b, r, o, y, g, b, v, g, w

    66.  28, 29, 30, 31

    67.  3",  5",  10",  12",  16"

    68.  4.75, 5.00, 5.50, 5.60, 5.90, 6.00, 6.10, 6.50, 6.70,
         7.10, 7.50, 7.60, 8.00, 8.10, 8.50

    69.  M, V, E, M, J, S, U, N, P

    70.  Q,Z

    71.  10, 11, 12, 13, 15, 16, 18, 20, 22, 24, 27, 30

    72.  0, 32, 100, 212

    73.  0, 1, 2, 3, 4, 5, 6, 7, 8, 9

    74.  650, 704, 709, 1401, 7070, 7090

    75.  -40

  ? 76.  2.5*10^6, 5*10^6, 10*10^6, 15*10^6, 25*10^6

    77.  16-2/3, 33-1/3, 45, 78

    78.  88, 108, 540, 1560

    79.  2-48, 2-56, 3-48, 3-56, 4-40, 4-48, 5-32, 5-40, 6-32, 6-40,
         8-32, 10-24, 10-32, 12-24

    80.  1, 1-1/2, 2-1/2, 4, 6, 8

    81.  Dynamics, Electric, Fireproofing, Foods, Insurance, Mills,
         Motors, Paint, Precision, Telephone, Tire