**Managing Workspace:** 
clear
disp
length
load
save
size
format

**Logical Functions:**
all
any
exist
find
logical

**MATLAB as a Programming Language:**
function

**Control Flow**:
break
case
else
elseif
end
error
for
if
otherwise
return
switch
warning
while

**Interactive Input:**
input
pause

**Elementary Matrices and Arrays:**
eye
ones
rand
randn
zeros

**Special Variables and Constants:**
eps
flops
i
inf
nan

**Measuring Time:**
tic
toc

**Matrix Manipulation:**
cat
diag
repmat
reshape

**Elementary Math Functions:**
abs
acos
angle
asin,
atan,
atan2
ceil
conj
cos
exp
floor
imag
log
mod
real
rem
sign
sin
sqrt
tan

**Matrix Analysis:**
cond
det
kron
norm
rank
rcond
rref
subspace
trace

**Linear Equations:** 
\ /
chol
inv
lu
pinv
qr

**Eigenvalues and Singular Values:**
eig
poly
schur
svd

**Matrix Functions:**
expm
funm
logm
sqrtm

**Basic Operations:**
convhull
cumprod
cumsum
max
mean
median
min
perms
prod
sort
sum

**Polynomials:**
roots

**Sparse Matrices:**
spdiags
speye
sprand
sprandn
sprandsym
find
full
sparse
nnz
nonzeros
nzmax
spalloc
spfun
spones
spy

**Sound Functions:**
sound
wavread
wavwrite
 
**String to Number Conversion:**
sprintf
sscanf

**I/O Functions:**
fprintf
fscanf
imread
imwrite

**Multidimensional Arrays:**
cat
flipdim
ipermute
ndgrid
ndims
permute
reshape
shiftdim
squeeze

**Cell Arrays, Structures, Object-oriented programming:** Do not use them!

**Graphics Commands:** You can use any.