﻿INVESTMENT 
  PROGRAM 
  NO. 
  1 
  

  

  CDC-3100 
  VERSION 
  OF 
  OTIS 
  HALL'S 
  

   PROGRAM 
  

  

  Complex 
  Investments 
  in 
  Forestry 
  

  

  Limitations. 
  — 
  This 
  program 
  will 
  handle 
  up 
  

   to 
  150 
  separate 
  items 
  of 
  cost 
  or 
  income, 
  will 
  

   cover 
  periods 
  of 
  up 
  to 
  200 
  years, 
  and 
  will 
  

   give 
  an 
  interest 
  rate 
  earned 
  up 
  to 
  50 
  percent, 
  

   carried 
  to 
  the 
  hundredth 
  of 
  a 
  percent. 
  The 
  

   highest 
  cash 
  value 
  that 
  can 
  be 
  entered 
  is 
  

   $999,999,999.99. 
  

  

  Data 
  input. 
  — 
  Data 
  are 
  prepared 
  on 
  80-col- 
  

   umn 
  punch 
  cards. 
  Three 
  cards 
  are 
  used 
  to 
  

   provide 
  data 
  needed 
  for 
  returning 
  output 
  to 
  

   user: 
  two 
  title 
  cards 
  identify 
  the 
  problem; 
  

   one 
  card 
  each 
  is 
  used 
  for 
  each 
  cash 
  flow 
  item 
  

   of 
  cost 
  or 
  income 
  in 
  any 
  one 
  year. 
  The 
  excep- 
  

   tion 
  to 
  this 
  is 
  an 
  annual 
  item 
  that 
  continues 
  

   at 
  a 
  constant 
  rate 
  over 
  the 
  time 
  period. 
  Any 
  

   annual 
  item 
  would 
  be 
  read 
  in 
  on 
  a 
  single 
  card 
  

   but 
  would 
  be 
  coded 
  as 
  shown 
  below. 
  

  

  Card 
  1 
  — 
  Identifies 
  Forest 
  

   Cols. 
  1-32— 
  Name 
  of 
  Forest 
  

  

  Card 
  2 
  — 
  Identifies 
  unit 
  

   Cols. 
  1-32 
  — 
  Name 
  of 
  unit 
  

  

  Card 
  3 
  — 
  Identifies 
  user 
  

   Cols. 
  1-32 
  — 
  Name 
  of 
  user 
  

  

  Card 
  4— 
  Title 
  card 
  

  

  Cols. 
  1-55 
  — 
  Name 
  of 
  problem 
  

  

  Card 
  5 
  — 
  Problem 
  description 
  

   Cols. 
  1-52 
  — 
  Description 
  

   Cols. 
  53-55 
  — 
  Number 
  of 
  items 
  (cards) 
  or 
  

   cost 
  and 
  income 
  

  

  Card 
  6 
  . 
  . 
  . 
  n 
  — 
  (Item 
  cards) 
  

   Cols. 
  1-3 
  — 
  Number 
  of 
  item 
  

   Cols. 
  4-59 
  — 
  Information 
  identifying 
  item 
  

   Col. 
  60 
  — 
  If 
  the 
  item 
  occurs 
  in 
  single 
  year, 
  

   code 
  "2"; 
  if 
  the 
  item 
  recurs 
  annually 
  

   from 
  the 
  beginning 
  of 
  the 
  investment, 
  

   code 
  "1." 
  

  

  Cols. 
  63-65 
  — 
  Years 
  since 
  beginning 
  of 
  in- 
  

   vestment 
  up 
  to 
  year 
  of 
  item. 
  The 
  num- 
  

   ber 
  of 
  years 
  entered 
  is 
  the 
  number 
  that 
  

  

  have 
  elapsed 
  since 
  the 
  investment 
  pro- 
  

   gram 
  was 
  initiated. 
  

  

  Cols. 
  68-80 
  — 
  Cash 
  value 
  of 
  the 
  item 
  to 
  

   the 
  nearest 
  cent. 
  The 
  decimal 
  point 
  is 
  

   punched 
  in 
  column 
  78. 
  If 
  the 
  item 
  is 
  

   a 
  cost, 
  a 
  minus 
  sign 
  is 
  placed 
  in 
  the 
  

   column 
  before 
  the 
  first 
  digit. 
  (There- 
  

   fore 
  column 
  68 
  never 
  contains 
  a 
  digit; 
  

   it 
  is 
  reserved 
  for 
  the 
  minus 
  sign.) 
  Cost 
  

   items 
  of 
  less 
  than 
  $1.00 
  are 
  punched 
  

   with 
  a 
  decimal 
  point 
  in 
  column 
  78 
  and 
  

   the 
  minus 
  sign 
  in 
  column 
  77. 
  

  

  Cardn+1 
  — 
  End-of-file 
  card 
  if 
  last 
  prob- 
  

   lem. 
  Any 
  number 
  of 
  problems 
  can 
  be 
  

   run 
  for 
  a 
  particular 
  Forest 
  by 
  repeat- 
  

   ing 
  cards 
  4 
  to 
  n. 
  Also, 
  problems 
  from 
  

   any 
  number 
  of 
  Forests 
  can 
  be 
  run 
  by 
  

   placing 
  a 
  card 
  with 
  NEW 
  FOREST 
  in 
  

   columns 
  1-10 
  between 
  each 
  set 
  of 
  For- 
  

   est 
  problems. 
  Repeat 
  cards 
  1 
  to 
  n 
  for 
  

   each 
  Forest. 
  End-of-file 
  card 
  follows 
  

   last 
  problem. 
  

  

  Output. 
  — 
  The 
  output 
  includes 
  the 
  data 
  

   identifying 
  the 
  user, 
  the 
  problem 
  identifica- 
  

   tion, 
  and 
  the 
  problem 
  data 
  cards. 
  Following 
  

   this, 
  the 
  interest 
  rates 
  tested 
  and 
  the 
  corres- 
  

   ponding 
  sums 
  (capital 
  values) 
  are 
  printed. 
  

   The 
  last 
  rate 
  printed 
  is 
  the 
  problem 
  answer 
  

   unless 
  

  

  1. 
  the 
  costs 
  exceed 
  the 
  income, 
  in 
  which 
  

   case 
  the 
  word 
  LOSS 
  is 
  printed, 
  

  

  2. 
  the 
  rate 
  earned 
  is 
  greater 
  than 
  50 
  per- 
  

   cent, 
  in 
  which 
  case 
  the 
  statement 
  IN- 
  

   TEREST 
  RATE 
  GREATER 
  THAN 
  50 
  

   PERCENT 
  is 
  printed. 
  

  

  7 
  Programs 
  in 
  this 
  appendix 
  were 
  adapted 
  by 
  J. 
  H. 
  

   Wikstrom 
  of 
  Inter 
  mountain 
  Station 
  from 
  Hall's 
  and 
  

   Row's 
  works. 
  

  

  s 
  See 
  footnote 
  5. 
  

  

  28 
  

  

  